`int(2x^(3))/((x^(2)+1)^(2))dx`

1.	`int(2x^(3))/((x^(2)+1)^(2))dx`
Answer» Correct Answer - `log (x^(2)+1) +(1)/(x^(2) +1)+c` first write 2x^3 as 2x.x^2 then derivation of x^2 is 2x which is in numerator now put x^2+1 that is denominator eaualt to t then differentiate w.r.t t then solve ques

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