1.

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

Answer»

`[tan^(-1)X^(2)]^(2)+C`
`(1)/(2)[tan^(-1)x^(2)]^(2)+c`
`2[tan^(-1)x^(2)]+c`
NONE of these

Answer :B


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