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int (x^2+1)/(x^4+1) dx...

`int (x^2+1)/(x^4+1) dx`

A

`(1)/(sqrt(2))tan^(-1)((x^2-1)/(sqrt(2)x))+c`

B

`(-1)/(sqrt(2))tan^(-1)((x^2-1)/(sqrt(2)x))+c`

C

`(1)/(sqrt(2))tan^(-1)((x^2+1)/(sqrt(2)x))+c`

D

`(-1)/(sqrt(2))tan^(-1)((x^2+1)/(sqrt(2)x))+c`

Text Solution

Verified by Experts

The correct Answer is:
A
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