inttan^(-1)xdx=......+c...

`inttan^(-1)xdx=`......+c

A

`xtan^(-1)x+(1)/(2)log|1+x^(2)|`

B

`xtan^(-1)x-(1)/(2)log|1+x^(2)|`

C

`(1)/(1+x^(2))`

D

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

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