1.

int (x^3)/(sqrt(1+x))dx=

Answer»

`SQRT(1+x^2)-(x)/(3)(1+x^2)^(3//2)+C`
`xsqrt(1+x^2)+(2)/(3)(1+x^2)^(3//2)+c`
`x^2sqrt(1+x^2)-(2)/(3)(1+x^2)^(3//2)+c`
`x^2sqrt(1+x^2)-(1)/(3)(1+x^2)^(1//2)+c`.

Answer :C


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