intxtan^(-1)x dx =...

`intxtan^(-1)x dx =`

A

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

B

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

C

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

D

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

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The correct Answer is:

A

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