int tan^(-1)( (2x)/(1-x^2))dx...

`int tan^(-1)( (2x)/(1-x^2))dx`

A

`x tan^(-1) x +C`

B

`x tan^(-1) x -log (1+x^2)+C`

C

`2x tan^(-1) x + log (1 +x^2 )+C`

D

`2x tan^(-1)x - log (1 +x^2)+C`

Verified by Experts

The correct Answer is:

D

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