1.

`int(x^(3)-1)/(x^(3)+x)` dx is equal to:A. `x-log_(e)|x|+log_(e)(x^(2)+1)-tan^(-1)x+C`B. `x-log_(e)|x|+(1)/(2)log_(e)(x^(2)+1)-tan^(-1)x+C`C. `x+log_(e)|x|+(1)/(2)log_(e)(x^(2)+1)+tan^(-1)x+C`D. none of these

Answer» Correct Answer - B
`int(x^(3)-1)/(x^(3)+x)dx=int(1+(1)/(1+x^(2))-(1)/(x)+(x)/(x^(2)+1))dx`
`=x-tan^(-1)x-log_(e)|x|+(1)/(2)log_(e)(x^(2)+1)+C`


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