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The value of the definite integral int...

The value of the definite integral ` int _(0)^(infty) (dx)/((1+x^(a))(1 + x^(2))) (a gt 0) ` is

A

`(pi)/(4)`

B

`(pi)/(2)`

C

`pi`

D

some function of a

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The correct Answer is:
A
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ARIHANT MATHS-DEFINITE INTEGRAL-Exercise (Single Option Correct Type Questions)
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  11. Let f(x) be a function satisfying f\'(x)=f(x) with f(0)=1 and g(x) be ...

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  12. Let f(x)=int0^g(x) dx/sqrt(1+t^2) where g(x) =int0^cosx (1+sint^2) dt....

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