CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

a7 = a + 6d = 49-------------(1) a17 = a + 16d = 289------------(2) Subtract (1) from (2) ; a + 6d = 49 a + 16d = 289 (-) (-) (-) ————————— -10d. = -240 10d = 240 : [ d = 24 ] Putting the value of d in (1) ; a + 6d = 49 a + 6 × 24 = 49 a + 144 = 49 a = 49 - 144 [ a = -95 ] An is not given in your question otherwise the formula of an is "a+(n-1)d"............

3Thank You

Kamlesh Dubey 6 years, 4 months ago

I think your question is incomplete

2Thank You

ANSWER

If we opt for basic maths in cbse board exam , then can we take physics in class 11 ??

Posted by Su Ghosh 6 years, 4 months ago

CBSE > Class 10 > Mathematics

6 answers

Rohan Vig 6 years, 4 months ago

0Thank You

Rajbir Yadav 6 years, 4 months ago

No you can n't take physics in 11th standard

2Thank You

Kamlesh Dubey 6 years, 4 months ago

Yes u can take physics in class 11th but you cannot take maths as an extra subject also if you want so you have to appear in standard maths

0Thank You

????? ?????? 6 years, 4 months ago

Ya sure

0Thank You

Alok Rajput 6 years, 4 months ago

Yes u can take physics in 11th

0Thank You

Khushi Keshri 6 years, 4 months ago

0Thank You

ANSWER

Theorem 6.1 bpt and theorem 6.2 converse bpt

Posted by Niraj Mali 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

2{2x-1/x+3}-3{x+3/2x-1}=5

Posted by Lakhan Bairagi 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How to prove an Quadratic Equation using*competing the square method*?

Posted by Zaid Ali 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Cbse latest sample papers released ?

Posted by Rajeev Mishra 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Zaid Ali 6 years, 4 months ago

You can find it on my CBSE Guide

0Thank You

ANSWER

Prove that sin70+cosec20/cos20+sec70 - 2cos70 .cosec20=0

Posted by Muskan Sharma 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Muskan Sharma 6 years, 4 months ago

Please give me answer in brief..

0Thank You

Amardeep Jassar 6 years, 4 months ago

1+tan square

0Thank You

ANSWER

How will we solve example 12 of chapter polynomial

Posted by Dhriti Pandey 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the sum of 1^2-2^2+3^2-4^2+5^2-6^2+...up to 2n terms.

Posted by Sanket Arjun 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Some students arrange a picnic and the cost of picnic is 240 because of four students are not going to the picnic so the cost of one student is increased by 5 and how many students are went to picnic

Posted by Khushal Singh Sankhla 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Ayush Pandey 6 years, 4 months ago

0Thank You

ANSWER

To make 6x2+5x=0 a prefect square, we need to add and substract............

Posted by Khushal Singh Sankhla 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If the angels of a trainge are in the ratio 1:2:6,determine the three angles

Posted by Roshikumar Tongbram 6 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Aryan Singh Baghel 6 years, 4 months ago

Let the angle be x 2x 6x and we know that sum of angle of triangle is 180. So x+2x+6x=180. 9x=180 x=180/9 x=20 so x=20,2x=2×20=40,6x=6×20=120

0Thank You

Khushi ?? 6 years, 4 months ago

X,2x ,6x are the angles..as assumed. Now x+2x+6x =180 Therefore 9x=180 x=20 Now substituting the valye of x in assumption we get all three angles they are 20,40,120.. Hope it helps u mate..

0Thank You

Amit Kumar 6 years, 4 months ago

Let the angles be x,2x and 6x. Then, x+2x+6x=180 9x=180 x=20 Therefore; angles are 20, 20×2=40, 20×6=120.

0Thank You

ANSWER