{"id":4472,"date":"2016-05-16T11:49:00","date_gmt":"2016-05-16T06:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-maths-exercise-7-5\/"},"modified":"2020-02-18T14:17:06","modified_gmt":"2020-02-18T08:47:06","slug":"ncert-solutions-class-12-maths-exercise-7-5","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-maths-exercise-7-5\/","title":{"rendered":"NCERT Solutions class 12 Maths Exercise 7.5"},"content":{"rendered":"<p>NCERT Solutions class 12 Maths Exercise 7.5 Class 12 Maths book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 12 Maths chapter wise NCERT solution for Maths part 1 and Maths part 2 for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>Download\u00a0<a href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-12-mathematics-integrals\/1291\/ncert-solutions\/5\/\">NCERT solutions for\u00a0Integrals\u00a0<\/a>as PDF.<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/12%20Maths%20Book%20Part-02%20.jpg\" alt=\"NCERT Solutions class 12 Maths Exercise 7.5\" width=\"185\" height=\"237\" \/><\/p>\n<h2>NCERT Solutions Class 12 Maths Integrals<\/h2>\n<p>&nbsp;<\/p>\n<p><strong>Integrate the (rational) function in Exercises 1 to 6.<\/strong><\/p>\n<p><strong>1.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image001.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image002.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image004.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image005.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>\u00a0on both sides A + B = 1 &#8230;..(ii)<\/p>\n<p>Comparing constants 2A + B = 0 &#8230;..(iii)<\/p>\n<p>Solving eq. (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image007.png\" \/>\u00a0and B = 2<\/p>\n<p>Putting these values of A and B in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image008.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image009.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image010.png\" \/><\/p>\n<p><span class=\"math-tex\"><span id=\"MathJax-Element-1-Frame\" class=\"MathJax\" style=\"box-sizing: border-box; -webkit-tap-highlight-color: transparent; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;\" tabindex=\"0\" role=\"presentation\" data-mathml=\"&lt;math xmlns=&quot;http:\/\/www.w3.org\/1998\/Math\/MathML&quot;&gt;&lt;mo&gt;=&lt;\/mo&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mi&gt;c&lt;\/mi&gt;&lt;\/math&gt;\"><span id=\"MathJax-Span-1\" class=\"math\"><span id=\"MathJax-Span-2\" class=\"mrow\"><span id=\"MathJax-Span-3\" class=\"mo\">=<\/span><span id=\"MathJax-Span-4\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-5\" class=\"mi\">l<\/span><span id=\"MathJax-Span-6\" class=\"mi\">o<\/span><span id=\"MathJax-Span-7\" class=\"mi\">g<\/span><span id=\"MathJax-Span-8\" class=\"texatom\"><span id=\"MathJax-Span-9\" class=\"mrow\"><span id=\"MathJax-Span-10\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-11\" class=\"mi\">x<\/span><span id=\"MathJax-Span-12\" class=\"mo\">+<\/span><span id=\"MathJax-Span-13\" class=\"mn\">1<\/span><span id=\"MathJax-Span-14\" class=\"texatom\"><span id=\"MathJax-Span-15\" class=\"mrow\"><span id=\"MathJax-Span-16\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-17\" class=\"mo\">+<\/span><span id=\"MathJax-Span-18\" class=\"mn\">2<\/span><span id=\"MathJax-Span-19\" class=\"mi\">l<\/span><span id=\"MathJax-Span-20\" class=\"mi\">o<\/span><span id=\"MathJax-Span-21\" class=\"mi\">g<\/span><span id=\"MathJax-Span-22\" class=\"texatom\"><span id=\"MathJax-Span-23\" class=\"mrow\"><span id=\"MathJax-Span-24\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-25\" class=\"mi\">x<\/span><span id=\"MathJax-Span-26\" class=\"mo\">+<\/span><span id=\"MathJax-Span-27\" class=\"mn\">2<\/span><span id=\"MathJax-Span-28\" class=\"texatom\"><span id=\"MathJax-Span-29\" class=\"mrow\"><span id=\"MathJax-Span-30\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-31\" class=\"mo\">+<\/span><span id=\"MathJax-Span-32\" class=\"mi\">c<\/span><\/span><\/span><span class=\"MJX_Assistive_MathML\" role=\"presentation\">=\u2212log|x+1|+2log|x+2|+c<\/span><\/span><\/span><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image011.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image012.png\" \/><\/p>\n<hr \/>\n<p><strong>2.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image013.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image014.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image015.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image016.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image017.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image018.png\" \/><\/p>\n<hr \/>\n<p><strong>3.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image019.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image019.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image020.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image021.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image022.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image023.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>: A + B + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: \u20135A \u2013 4B \u2013 3C= 3<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a05A + 4B + 3C = \u20133 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: 6A + 3B + 2C = \u20131 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (i), (ii) and (iii), we get A = 1, B = \u20135, C = 4<\/p>\n<p>Putting the values of A, B and C in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image019.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image025.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image026.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image027.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image026.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image028.png\" \/><\/p>\n<hr \/>\n<p><strong>4.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image029.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image029.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image020.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image030.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image031.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image032.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>: A + B + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: \u20135A \u2013 4B \u2013 3C= 1<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a05A + 4B + 3C = \u20131 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: 6A + 3B + 2C = 0 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (i), (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image033.png\" \/>\u00a0B = \u20132, C =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image034.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image029.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image035.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image036.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image037.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image036.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image038.png\" \/><\/p>\n<hr \/>\n<p><strong>5.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image039.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image039.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image040.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image041.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image042.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image043.png\" \/>\u00a0&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image044.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image045.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>\u00a0on both sides A + B = 2 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing constants 2A + B = 0 &#8230;..(iii)<\/p>\n<p>Solving eq. (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image046.png\" \/>\u00a0and B = 4<\/p>\n<p>Putting these values of A and B in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image047.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image009.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image048.png\" \/><\/p>\n<p><span class=\"math-tex\"><span id=\"MathJax-Element-2-Frame\" class=\"MathJax\" style=\"box-sizing: border-box; -webkit-tap-highlight-color: transparent; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;\" tabindex=\"0\" role=\"presentation\" data-mathml=\"&lt;math xmlns=&quot;http:\/\/www.w3.org\/1998\/Math\/MathML&quot;&gt;&lt;mo&gt;=&lt;\/mo&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;4&lt;\/mn&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mi&gt;c&lt;\/mi&gt;&lt;\/math&gt;\"><span id=\"MathJax-Span-33\" class=\"math\"><span id=\"MathJax-Span-34\" class=\"mrow\"><span id=\"MathJax-Span-35\" class=\"mo\">=<\/span><span id=\"MathJax-Span-36\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-37\" class=\"mn\">2<\/span><span id=\"MathJax-Span-38\" class=\"mi\">l<\/span><span id=\"MathJax-Span-39\" class=\"mi\">o<\/span><span id=\"MathJax-Span-40\" class=\"mi\">g<\/span><span id=\"MathJax-Span-41\" class=\"texatom\"><span id=\"MathJax-Span-42\" class=\"mrow\"><span id=\"MathJax-Span-43\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-44\" class=\"mi\">x<\/span><span id=\"MathJax-Span-45\" class=\"mo\">+<\/span><span id=\"MathJax-Span-46\" class=\"mn\">1<\/span><span id=\"MathJax-Span-47\" class=\"texatom\"><span id=\"MathJax-Span-48\" class=\"mrow\"><span id=\"MathJax-Span-49\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-50\" class=\"mo\">+<\/span><span id=\"MathJax-Span-51\" class=\"mn\">4<\/span><span id=\"MathJax-Span-52\" class=\"mi\">l<\/span><span id=\"MathJax-Span-53\" class=\"mi\">o<\/span><span id=\"MathJax-Span-54\" class=\"mi\">g<\/span><span id=\"MathJax-Span-55\" class=\"texatom\"><span id=\"MathJax-Span-56\" class=\"mrow\"><span id=\"MathJax-Span-57\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-58\" class=\"mi\">x<\/span><span id=\"MathJax-Span-59\" class=\"mo\">+<\/span><span id=\"MathJax-Span-60\" class=\"mn\">2<\/span><span id=\"MathJax-Span-61\" class=\"texatom\"><span id=\"MathJax-Span-62\" class=\"mrow\"><span id=\"MathJax-Span-63\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-64\" class=\"mo\">+<\/span><span id=\"MathJax-Span-65\" class=\"mi\">c<\/span><\/span><\/span><span class=\"MJX_Assistive_MathML\" role=\"presentation\">=\u22122log|x+1|+4log|x+2|+c<\/span><\/span><\/span><\/p>\n<p><span class=\"math-tex\"><span id=\"MathJax-Element-3-Frame\" class=\"MathJax\" style=\"box-sizing: border-box; -webkit-tap-highlight-color: transparent; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;\" tabindex=\"0\" role=\"presentation\" data-mathml=\"&lt;math xmlns=&quot;http:\/\/www.w3.org\/1998\/Math\/MathML&quot;&gt;&lt;mo&gt;=&lt;\/mo&gt;&lt;mn&gt;4&lt;\/mn&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mi&gt;c&lt;\/mi&gt;&lt;\/math&gt;\"><span id=\"MathJax-Span-66\" class=\"math\"><span id=\"MathJax-Span-67\" class=\"mrow\"><span id=\"MathJax-Span-68\" class=\"mo\">=<\/span><span id=\"MathJax-Span-69\" class=\"mn\">4<\/span><span id=\"MathJax-Span-70\" class=\"mi\">l<\/span><span id=\"MathJax-Span-71\" class=\"mi\">o<\/span><span id=\"MathJax-Span-72\" class=\"mi\">g<\/span><span id=\"MathJax-Span-73\" class=\"texatom\"><span id=\"MathJax-Span-74\" class=\"mrow\"><span id=\"MathJax-Span-75\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-76\" class=\"mi\">x<\/span><span id=\"MathJax-Span-77\" class=\"mo\">+<\/span><span id=\"MathJax-Span-78\" class=\"mn\">2<\/span><span id=\"MathJax-Span-79\" class=\"texatom\"><span id=\"MathJax-Span-80\" class=\"mrow\"><span id=\"MathJax-Span-81\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-82\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-83\" class=\"mn\">2<\/span><span id=\"MathJax-Span-84\" class=\"mi\">l<\/span><span id=\"MathJax-Span-85\" class=\"mi\">o<\/span><span id=\"MathJax-Span-86\" class=\"mi\">g<\/span><span id=\"MathJax-Span-87\" class=\"texatom\"><span id=\"MathJax-Span-88\" class=\"mrow\"><span id=\"MathJax-Span-89\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-90\" class=\"mi\">x<\/span><span id=\"MathJax-Span-91\" class=\"mo\">+<\/span><span id=\"MathJax-Span-92\" class=\"mn\">1<\/span><span id=\"MathJax-Span-93\" class=\"texatom\"><span id=\"MathJax-Span-94\" class=\"mrow\"><span id=\"MathJax-Span-95\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-96\" class=\"mo\">+<\/span><span id=\"MathJax-Span-97\" class=\"mi\">c<\/span><\/span><\/span><span class=\"MJX_Assistive_MathML\" role=\"presentation\">=4log|x+2|\u22122log|x+1|+c<\/span><\/span><\/span><\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p><strong>6.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image050.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image050.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image051.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image052.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image053.png\" \/>\u00a0(Dividing numerator by denominator)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image009.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image054.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image055.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p>Now\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image056.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image057.png\" \/>\u00a0&#8230;&#8230;.(ii)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image058.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image059.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>\u00a0on both sides \u20132A + B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image060.png\" \/>\u00a0&#8230;..(iii)<\/p>\n<p>Comparing constants A = 1 &#8230;&#8230;.(iv)<\/p>\n<p>Solving eq. (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image061.png\" \/>\u00a0and B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image034.png\" \/><\/p>\n<p>Putting these values of A and B in eq. (ii),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image062.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image009.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image063.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image064.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image065.png\" \/><\/p>\n<p>Putting this value in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image066.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image067.png\" \/><\/p>\n<hr \/>\n<p><strong>Integrate the following function in Exercises 7 to 12.<\/strong><\/p>\n<p><strong>7.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image068.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image069.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image070.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image071.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image072.png\" \/>\u00a0A + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>, \u2013A + B = 1 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constant terms, \u2013B + C = 0 &#8230;&#8230;.(iv)<\/p>\n<p>Solving eq. (ii), (iii) and (iv), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image073.png\" \/>\u00a0B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image074.png\" \/>\u00a0and C =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image074.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (i),\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image075.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image076.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image077.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image078.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image079.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image080.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image081.png\" \/><\/p>\n<hr \/>\n<p><strong>8.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image082.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image082.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image083.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image084.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image085.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image086.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>: A + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: A + B \u2013 2C= 1 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: \u20132A + 2B + C = 0 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (i), (ii) and (iii), we get<\/p>\n<p>A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image087.png\" \/>\u00a0B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image088.png\" \/>\u00a0C =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image089.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (i),\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image090.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image091.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image092.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image093.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image094.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image095.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image096.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image097.png\" \/><\/p>\n<hr \/>\n<p><strong>9.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image098.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image098.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image099.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image100.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image101.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image102.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image103.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image104.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image105.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image106.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>: A + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: B \u2013 2C= 3 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: \u20132A + B + C = 5 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (i), (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image073.png\" \/>\u00a0B = 4, C =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image074.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image098.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image107.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image109.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image110.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image111.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image112.png\" \/><\/p>\n<hr \/>\n<p><strong>10.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image113.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image113.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image114.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image115.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image116.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image117.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image118.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>: 2A + 2B + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: 5A + B = 2 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: 3A \u2013 3B \u2013 C = \u20133 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (i), (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image119.png\" \/>\u00a0B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image120.png\" \/>\u00a0C =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image121.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image113.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image122.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image123.png\" \/>\u00a0=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image124.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image125.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image126.png\" \/><\/p>\n<p><span class=\"math-tex\"><span id=\"MathJax-Element-4-Frame\" class=\"MathJax\" style=\"box-sizing: border-box; -webkit-tap-highlight-color: transparent; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;\" tabindex=\"0\" role=\"presentation\" data-mathml=\"&lt;math xmlns=&quot;http:\/\/www.w3.org\/1998\/Math\/MathML&quot;&gt;&lt;mo&gt;=&lt;\/mo&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mfrac&gt;&lt;mn&gt;5&lt;\/mn&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;\/mfrac&gt;&lt;\/mrow&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mfrac&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mn&gt;10&lt;\/mn&gt;&lt;\/mfrac&gt;&lt;\/mrow&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mfrac&gt;&lt;mn&gt;12&lt;\/mn&gt;&lt;mn&gt;5&lt;\/mn&gt;&lt;\/mfrac&gt;&lt;\/mrow&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;3&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mi&gt;c&lt;\/mi&gt;&lt;\/math&gt;\"><span id=\"MathJax-Span-98\" class=\"math\"><span id=\"MathJax-Span-99\" class=\"mrow\"><span id=\"MathJax-Span-100\" class=\"mo\">=<\/span><span id=\"MathJax-Span-101\" class=\"texatom\"><span id=\"MathJax-Span-102\" class=\"mrow\"><span id=\"MathJax-Span-103\" class=\"mfrac\"><span id=\"MathJax-Span-104\" class=\"mn\">5<\/span><span id=\"MathJax-Span-105\" class=\"mn\">2<\/span><\/span><\/span><\/span><span id=\"MathJax-Span-106\" class=\"mi\">l<\/span><span id=\"MathJax-Span-107\" class=\"mi\">o<\/span><span id=\"MathJax-Span-108\" class=\"mi\">g<\/span><span id=\"MathJax-Span-109\" class=\"texatom\"><span id=\"MathJax-Span-110\" class=\"mrow\"><span id=\"MathJax-Span-111\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-112\" class=\"mi\">x<\/span><span id=\"MathJax-Span-113\" class=\"mo\">+<\/span><span id=\"MathJax-Span-114\" class=\"mn\">1<\/span><span id=\"MathJax-Span-115\" class=\"texatom\"><span id=\"MathJax-Span-116\" class=\"mrow\"><span id=\"MathJax-Span-117\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-118\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-119\" class=\"texatom\"><span id=\"MathJax-Span-120\" class=\"mrow\"><span id=\"MathJax-Span-121\" class=\"mfrac\"><span id=\"MathJax-Span-122\" class=\"mn\">1<\/span><span id=\"MathJax-Span-123\" class=\"mn\">10<\/span><\/span><\/span><\/span><span id=\"MathJax-Span-124\" class=\"mi\">l<\/span><span id=\"MathJax-Span-125\" class=\"mi\">o<\/span><span id=\"MathJax-Span-126\" class=\"mi\">g<\/span><span id=\"MathJax-Span-127\" class=\"texatom\"><span id=\"MathJax-Span-128\" class=\"mrow\"><span id=\"MathJax-Span-129\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-130\" class=\"mi\">x<\/span><span id=\"MathJax-Span-131\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-132\" class=\"mn\">1<\/span><span id=\"MathJax-Span-133\" class=\"texatom\"><span id=\"MathJax-Span-134\" class=\"mrow\"><span id=\"MathJax-Span-135\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-136\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-137\" class=\"texatom\"><span id=\"MathJax-Span-138\" class=\"mrow\"><span id=\"MathJax-Span-139\" class=\"mfrac\"><span id=\"MathJax-Span-140\" class=\"mn\">12<\/span><span id=\"MathJax-Span-141\" class=\"mn\">5<\/span><\/span><\/span><\/span><span id=\"MathJax-Span-142\" class=\"mi\">l<\/span><span id=\"MathJax-Span-143\" class=\"mi\">o<\/span><span id=\"MathJax-Span-144\" class=\"mi\">g<\/span><span id=\"MathJax-Span-145\" class=\"texatom\"><span id=\"MathJax-Span-146\" class=\"mrow\"><span id=\"MathJax-Span-147\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-148\" class=\"mn\">2<\/span><span id=\"MathJax-Span-149\" class=\"mi\">x<\/span><span id=\"MathJax-Span-150\" class=\"mo\">+<\/span><span id=\"MathJax-Span-151\" class=\"mn\">3<\/span><span id=\"MathJax-Span-152\" class=\"texatom\"><span id=\"MathJax-Span-153\" class=\"mrow\"><span id=\"MathJax-Span-154\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-155\" class=\"mo\">+<\/span><span id=\"MathJax-Span-156\" class=\"mi\">c<\/span><\/span><\/span><span class=\"MJX_Assistive_MathML\" role=\"presentation\">=52log|x+1|\u2212110log|x\u22121|\u2212125log|2x+3|+c<\/span><\/span><\/span><\/p>\n<hr \/>\n<p><strong>11.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image127.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image127.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image128.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image129.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image130.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image131.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image132.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>: A + +B + C = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: \u2013B + 3C= 5 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: \u20134A \u2013 2B + 2C = 0 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (i), (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image133.png\" \/>\u00a0B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image134.png\" \/>\u00a0C =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image135.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image127.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image136.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image138.png\" \/><\/p>\n<p><span class=\"math-tex\"><span id=\"MathJax-Element-5-Frame\" class=\"MathJax\" style=\"box-sizing: border-box; -webkit-tap-highlight-color: transparent; display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;\" tabindex=\"0\" role=\"presentation\" data-mathml=\"&lt;math xmlns=&quot;http:\/\/www.w3.org\/1998\/Math\/MathML&quot;&gt;&lt;mo&gt;=&lt;\/mo&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mfrac&gt;&lt;mn&gt;5&lt;\/mn&gt;&lt;mn&gt;3&lt;\/mn&gt;&lt;\/mfrac&gt;&lt;\/mrow&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;1&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mfrac&gt;&lt;mn&gt;5&lt;\/mn&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;\/mfrac&gt;&lt;\/mrow&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mfrac&gt;&lt;mn&gt;5&lt;\/mn&gt;&lt;mn&gt;6&lt;\/mn&gt;&lt;\/mfrac&gt;&lt;\/mrow&gt;&lt;mi&gt;l&lt;\/mi&gt;&lt;mi&gt;o&lt;\/mi&gt;&lt;mi&gt;g&lt;\/mi&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mi&gt;x&lt;\/mi&gt;&lt;mo&gt;&amp;#x2212;&lt;\/mo&gt;&lt;mn&gt;2&lt;\/mn&gt;&lt;mrow class=&quot;MJX-TeXAtom-ORD&quot;&gt;&lt;mo stretchy=&quot;false&quot;&gt;|&lt;\/mo&gt;&lt;\/mrow&gt;&lt;mo&gt;+&lt;\/mo&gt;&lt;mi&gt;c&lt;\/mi&gt;&lt;\/math&gt;\"><span id=\"MathJax-Span-157\" class=\"math\"><span id=\"MathJax-Span-158\" class=\"mrow\"><span id=\"MathJax-Span-159\" class=\"mo\">=<\/span><span id=\"MathJax-Span-160\" class=\"texatom\"><span id=\"MathJax-Span-161\" class=\"mrow\"><span id=\"MathJax-Span-162\" class=\"mfrac\"><span id=\"MathJax-Span-163\" class=\"mn\">5<\/span><span id=\"MathJax-Span-164\" class=\"mn\">3<\/span><\/span><\/span><\/span><span id=\"MathJax-Span-165\" class=\"mi\">l<\/span><span id=\"MathJax-Span-166\" class=\"mi\">o<\/span><span id=\"MathJax-Span-167\" class=\"mi\">g<\/span><span id=\"MathJax-Span-168\" class=\"texatom\"><span id=\"MathJax-Span-169\" class=\"mrow\"><span id=\"MathJax-Span-170\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-171\" class=\"mi\">x<\/span><span id=\"MathJax-Span-172\" class=\"mo\">+<\/span><span id=\"MathJax-Span-173\" class=\"mn\">1<\/span><span id=\"MathJax-Span-174\" class=\"texatom\"><span id=\"MathJax-Span-175\" class=\"mrow\"><span id=\"MathJax-Span-176\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-177\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-178\" class=\"texatom\"><span id=\"MathJax-Span-179\" class=\"mrow\"><span id=\"MathJax-Span-180\" class=\"mfrac\"><span id=\"MathJax-Span-181\" class=\"mn\">5<\/span><span id=\"MathJax-Span-182\" class=\"mn\">2<\/span><\/span><\/span><\/span><span id=\"MathJax-Span-183\" class=\"mi\">l<\/span><span id=\"MathJax-Span-184\" class=\"mi\">o<\/span><span id=\"MathJax-Span-185\" class=\"mi\">g<\/span><span id=\"MathJax-Span-186\" class=\"texatom\"><span id=\"MathJax-Span-187\" class=\"mrow\"><span id=\"MathJax-Span-188\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-189\" class=\"mi\">x<\/span><span id=\"MathJax-Span-190\" class=\"mo\">+<\/span><span id=\"MathJax-Span-191\" class=\"mn\">2<\/span><span id=\"MathJax-Span-192\" class=\"texatom\"><span id=\"MathJax-Span-193\" class=\"mrow\"><span id=\"MathJax-Span-194\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-195\" class=\"mo\">+<\/span><span id=\"MathJax-Span-196\" class=\"texatom\"><span id=\"MathJax-Span-197\" class=\"mrow\"><span id=\"MathJax-Span-198\" class=\"mfrac\"><span id=\"MathJax-Span-199\" class=\"mn\">5<\/span><span id=\"MathJax-Span-200\" class=\"mn\">6<\/span><\/span><\/span><\/span><span id=\"MathJax-Span-201\" class=\"mi\">l<\/span><span id=\"MathJax-Span-202\" class=\"mi\">o<\/span><span id=\"MathJax-Span-203\" class=\"mi\">g<\/span><span id=\"MathJax-Span-204\" class=\"texatom\"><span id=\"MathJax-Span-205\" class=\"mrow\"><span id=\"MathJax-Span-206\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-207\" class=\"mi\">x<\/span><span id=\"MathJax-Span-208\" class=\"mo\">\u2212<\/span><span id=\"MathJax-Span-209\" class=\"mn\">2<\/span><span id=\"MathJax-Span-210\" class=\"texatom\"><span id=\"MathJax-Span-211\" class=\"mrow\"><span id=\"MathJax-Span-212\" class=\"mo\">|<\/span><\/span><\/span><span id=\"MathJax-Span-213\" class=\"mo\">+<\/span><span id=\"MathJax-Span-214\" class=\"mi\">c<\/span><\/span><\/span><span class=\"MJX_Assistive_MathML\" role=\"presentation\">=53log|x+1|\u221252log|x+2|+56log|x\u22122|+c<\/span><\/span><\/span><\/p>\n<hr \/>\n<p><strong>12.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image140.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image140.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image141.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n[On dividing numerator by denominator]\n<p>Let\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image142.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image143.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image144.png\" \/>\u00a0&#8230;&#8230;.(ii)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image145.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image146.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>: A + B = 2 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants: \u2013A + B = 1 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (iii) and (iv), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image033.png\" \/>\u00a0B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image034.png\" \/><\/p>\n<p>Putting the values of A, B and C in eq. (ii),\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image142.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image147.png\" \/><\/p>\n<p>Putting this value in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image140.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image148.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image149.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image150.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image151.png\" \/><\/p>\n<hr \/>\n<p><strong>Integrate the following function in Exercises 13 to 17.<\/strong><\/p>\n<p><strong>13.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image152.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image152.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image153.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image154.png\" \/>\u00a0=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image155.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image154.png\" \/>\u00a0=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image156.png\" \/><\/p>\n<p>Comparing the coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image024.png\" \/>\u00a0A \u2013 B = 0 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing the coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image006.png\" \/>\u00a0B \u2013 C = 0 &#8230;&#8230;.(iii)<\/p>\n<p>Comparing constants A + C = 2 &#8230;&#8230;.(iv)<\/p>\n<p>On solving eq. (ii), (iii) and (iv), we get A = 1, B = 1, C = 1<\/p>\n<p>Putting these values of A, B and C in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image152.png\" \/>\u00a0=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image157.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image158.png\" \/>\u00a0=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image159.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image161.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image162.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image163.png\" \/><\/p>\n<hr \/>\n<p><strong>14.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image164.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image165.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image166.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image167.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image168.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image169.png\" \/><\/p>\n<p>Putting this value in eq. (i),<\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image170.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image171.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image172.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image173.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image174.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image175.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image176.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image177.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image178.png\" \/><\/p>\n<hr \/>\n<p><strong>15.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image179.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image179.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image180.png\" \/><\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image181.png\" \/>,\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image179.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image182.png\" \/>\u00a0&#8230;..(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image183.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image184.png\" \/><\/p>\n<p>Comparing the coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image185.png\" \/>\u00a0A + B = 0 &#8230;&#8230;(ii)<\/p>\n<p>Comparing constants A \u2013 B = 1 &#8230;&#8230;.(iii)<\/p>\n<p>On solving the eq. (ii) and (iii), we get A =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image033.png\" \/>\u00a0B =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image060.png\" \/><\/p>\n<p>Putting the values of A, B and\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image185.png\" \/>\u00a0in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image186.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image187.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image188.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image189.png\" \/><\/p>\n<hr \/>\n<p><strong>16.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image190.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image191.png\" \/><\/p>\n<p>Multiplying both numerator and denominator by\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image192.png\" \/>,<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image193.png\" \/><\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image194.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image195.png\" \/>\u00a0&#8230;&#8230;..(i)<\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image196.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image197.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image003.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image198.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image009.png\" \/>\u00a0From eq. (i),<\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image199.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image200.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image201.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image202.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image203.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image204.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image205.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image206.png\" \/><\/p>\n<hr \/>\n<p><strong>17.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image207.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image208.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image209.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image211.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image212.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image213.png\" \/>\u00a0From eq. (i), I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image214.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image215.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image216.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image217.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image218.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image219.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image220.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image221.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image222.png\" \/><\/p>\n<hr \/>\n<p><strong>Integrate the following function in Exercises 18 to 21.<\/strong><\/p>\n<p><strong>18.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image223.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image223.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image224.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image225.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image226.png\" \/>\u00a0&#8230;&#8230;.(ii)<\/p>\n<p>Dividing numerator by denominator,<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image223.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image227.png\" \/>\u00a0&#8230;.(iii)<\/p>\n<p>Let\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image228.png\" \/>\u00a0&#8230;&#8230;.(iv)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image229.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image230.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image231.png\" \/>\u00a0A + B = \u20134 &#8230;&#8230;.(v)<\/p>\n<p>Comparing constants 4A + 3B = \u201310 &#8230;&#8230;.(vi)<\/p>\n<p>On solving eq. (v) and (vi), we get A = 2, B = \u20136<\/p>\n<p>Putting the values of A, B and\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image231.png\" \/>\u00a0in eq. (iii),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image223.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image232.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image233.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image234.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image235.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image236.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image237.png\" \/><\/p>\n<hr \/>\n<p><strong>19.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image238.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image239.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image240.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image241.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image213.png\" \/>\u00a0From eq. (i),<\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image242.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image243.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image244.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image245.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image246.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image247.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image248.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image249.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image250.png\" \/><\/p>\n<hr \/>\n<p><strong>20.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image251.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image252.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image253.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image254.png\" \/>&#8230;(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image255.png\" \/><\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image256.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image257.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image258.png\" \/><\/p>\n<p>Putting this value in eq. (i),<\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image259.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image260.png\" \/><\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image261.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image262.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image263.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image264.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image265.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image266.png\" \/><\/p>\n<hr \/>\n<p><strong>21.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image267.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image268.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image269.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image270.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image271.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image272.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image213.png\" \/>\u00a0From eq. (i),<\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image273.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image274.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image275.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image276.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image277.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image278.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image279.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image280.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image281.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image282.png\" \/><\/p>\n<hr \/>\n<p><strong>Choose the correct answer in each of the Exercise 22 and 23.<\/strong><\/p>\n<p><strong>22.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image283.png\" \/>\u00a0equals:<\/strong><\/p>\n<p><strong>(A)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image284.png\" \/><\/strong><\/p>\n<p><strong>(B)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image285.png\" \/><\/strong><\/p>\n<p><strong>(C)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image286.png\" \/><\/strong><\/p>\n<p><strong>(D)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image287.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image288.png\" \/>\u00a0&#8230;&#8230;.(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image289.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image290.png\" \/><\/p>\n<p>Comparing coefficients of\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image291.png\" \/>\u00a0A + B = 1 &#8230;&#8230;.(ii)<\/p>\n<p>Comparing constants \u20132A \u2013 B = 0 &#8230;&#8230;.(iii)<\/p>\n<p>On solving eq. (ii) and (iii), we get A = \u20131, B = 2<\/p>\n<p>Putting these values of A and B in eq. (i),<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image292.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image293.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image294.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image295.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image296.png\" \/><\/p>\n<p>Therefore, option (B) is correct.<\/p>\n<hr \/>\n<p><strong>23.\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image297.png\" \/>\u00a0equals:<\/strong><\/p>\n<p><strong>(A)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image298.png\" \/><\/strong><\/p>\n<p><strong>(B)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image299.png\" \/><\/strong><\/p>\n<p><strong>(C)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image300.png\" \/><\/strong><\/p>\n<p><strong>(D)\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image301.png\" \/><\/strong><\/p>\n<p><strong>Ans.\u00a0<\/strong>Let I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image302.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image303.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image304.png\" \/>\u00a0&#8230;(i)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image305.png\" \/><\/p>\n<p>Putting\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image240.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image306.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image210.png\" \/>\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image241.png\" \/><\/p>\n<p>Putting this value in eq. (i),<\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image307.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image308.png\" \/><\/p>\n<p>I =\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image309.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image310.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image311.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image312.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image313.png\" \/><\/p>\n<p>=\u00a0<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/maths\/Ex7.5\/image314.png\" \/><\/p>\n<p>Therefore, option (A) is correct.<\/p>\n<h2 style=\"text-align: justify;\">NCERT Solutions class 12 Maths Exercise 7.5<\/h2>\n<p>NCERT Solutions Class 12 Maths PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 12 Maths includes text book solutions from both part 1 and part 2. NCERT Solutions for CBSE Class 12 Maths have total 13 chapters. 12 Maths NCERT Solutions in PDF for free Download on our website. Ncert Maths class 12 solutions PDF and Maths ncert class 12 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide<\/p>\n<h2>CBSE App for Students<\/h2>\n<p>To download\u00a0NCERT Solutions for class 12 Physics, Chemistry, Biology, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions class 12 Maths Exercise 7.5 Class 12 Maths book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. 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