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

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

A

`1/sqrt2 tan^(-1) ((x^(2)+1)`

B

`1/sqrt2 tan^(-1) ((x^(2)+1)/(sqrt2))`

C

`1/sqrt2 tan^(-1) ((x^(2)-1)`

D

`1/sqrt2 tan^(-1) ((x^(2)-1)/(sqrt2))`

Text Solution

Verified by Experts

The correct Answer is:
D
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