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Prove that 5/root2 is an irrational no.

Posted by Ekangika Das 1 year, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Priya Rani 1 year, 2 months ago

Or Let √2 is a rational number √2 = p/q √2q= p ( square on both side ) (√2q)² = p² 2q² = p² P² is a divisible by 2q², p also divisible by 2q²( according to theorem) P = 2c ( c is a constant) P=2c ( square on both side) P² = (2c)² P² = 4c² 2q² = 4c² q² = 4c²/2 q² = 2c² q² is divisible by 2c² , then q is also divisible by 2c². In this we can see p and q have atleast one common factor : 3 Contradict the fact was p and q are co prime . proved √2 is irrational number. When we any number multiply with irrational number so answer is also irrational number. 5√2 is an irrational number. Hence proved

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Priya Rani 1 year, 2 months ago

√2 is an irrational number If we add , sub, multiply, divede a number by irrational number so answer is also irrational number.

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The condition for the linear polynomial ax + b =0 to have a real root is

Posted by Srijani Chakraborty 1 year, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Ex 8.2 question no1

Posted by Karan Rawat 1 year, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Diya Mehra 1 year, 2 months ago

Ques no.1 (1) sin 60 cos 30 + sin 30 cos 60 = √3/2*√3/2 + 1/2*1/2 = 3/4 + 1/4 = 4/4 = 1 ans...

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Aslaha V S 1 year, 2 months ago

India is competitive manufacturing location due to the low cost of manpower and strong technical and engineering capabilities contributing to higher quality production runs. The production of TV sets in a factory increases uniformly by a fixed number every year. It produced 16000 sets in 6th year and 22600 in 9th year. In which year, the production is ₹ 29,200. Find the production during 8th year. OR Find the production during first 3 years. Find the difference of the production during 7th year and 4th year.

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Find sinA - cosB + tanA for the given triangle

Posted by Devash Roshan 1 year, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

13+12

Posted by Ujjwal Mutha 1 year, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Ankit Kumar 1 year, 2 months ago

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Sanju Kumar 1 year, 2 months ago

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Garvit Varshney 1 year, 2 months ago

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Balamadesh V 1 year, 2 months ago

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Kumud 1 year, 2 months ago

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Find the roots of the quadratic equation xsquare-x-2=0

Posted by Sanvi.M.S Sanvi.M.S 1 year, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Manish Kushwah 1 year, 2 months ago

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Sameer Biswakarma 1 year, 2 months ago

x²-x-2 x²-2x+1x-2 x(x-2) 1(x-2) (x-2)(x-1) x=2 and 1

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Dev Sharma 1 year, 2 months ago

x²-x-2 this is solved by quadratic formula Here a=1,b=1, C=2 -b+√b²-4ac/2a -1+√1²-4(1)(2)/2(1) -1+√7/2 यही हमारा उत्तर हे|

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What is the Quadratic Formula ?

Posted by Jeet Singh 1 year, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Sameer Biswakarma 1 year, 2 months ago

x=-b±√D/2a ( here D= b²-4ac )

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Shreyas Srinath 1 year, 2 months ago

-b +_ /b^2 -4ac whole divided by 2a

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Mohmmad Naveel 1 year, 2 months ago

ax² + bx + c = 0

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If two positive integers x and y are expressible in terms of primes as x = p ^ 2 * q ^ 3 and y = p ^ 3 * q what can you say about their LCM and HCF. Is LCM a multiple of HCF?

Posted by Harshit Tripathi 1 year, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Sameer Biswakarma 1 year, 2 months ago

LCM = p³p³ and HCF = p²q

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Dev Sharma 1 year, 2 months ago

LCM of x and y is p³q³ and HCF is p²q¹.and LCM is always a multiple of HCF

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Harshit Tripathi 1 year, 2 months ago

Yes lcm is a multiple of HCF

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5.2

Posted by Mohit Mandal 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Tilak Fauzdar 1 year, 2 months ago

What is the sqaure of 69

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Find the center of the circle passing through the points (6'-6)'(3'-7) and (3'3)

Posted by Vinay Pal Vinaypal 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Nasir Ahmad 1 year, 2 months ago

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ANSWER

In the following aps

Posted by Mifrah Ali 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Pooja Yadav 1 year, 2 months ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

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The sum of four consecutive numbers in AP is 32 and the ratio of the product of the first and the last to the product of two middle terms is 7 : 15 . Find the numbers

Posted by Mithun Gowda 1 year, 2 months ago

CBSE > Class 10 > Mathematics