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

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

A

`(1)/(sqrt(2)) log_(e) (x^(2)) + C`

B

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

C

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

D

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

Text Solution

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The correct Answer is:
A
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