int(x^(3))/(sqrt(1+x^(2)))dx=a(1+x^(2))^...

`int(x^(3))/(sqrt(1+x^(2)))dx=a(1+x^(2))^((3)/(2))+b* sqrt(1+x^(2))+C`

`a=(1)/(3) and b=1`

`a=-(1)/(3) and b=1`

`a=-(1)/(3) and b=-1`

`a=(1)/(3) and b=-1`

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