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If the integrand is a rational function of `x` and fractional power of a linear fractional of the form `(ax+b)/(cx+d)`, then rationalization of the integral is affected by the substitution `(ax+b)/(cx+d)=t^(m)`, where `m` is L.C.M. of fractional powers of `(ax+b)/(cx+d)`.
`int(dx)/((x+1)^(2//3)(x-1)^(4//3))=k[(1+x)/(1-x)]^(1//3)+C` then

A

`k=(2)/(3)`

B

`k=(3)/(2)`

C

`k=(1)/(3)`

D

`k=(1)/(2)`

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