1.

On 1 sub R - {-1, 1}, int tan^(-1) ((2x)/(1-x^(2))) dx=

Answer»

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

ANSWER :C


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