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Let f(x)=(x)/((1+x^(n))^(1//n)) for n ge...

Let `f(x)=(x)/((1+x^(n))^(1//n))` for `n ge 2` and `g(x)=underset("n times")underbrace(fofo ..."of"(x))`, then `int x^(n-2)g(x)dx` equals to

A

`1/(n(n-1))(1+nx^(n))^(1+1/n)`+K

B

`1/(n-1)(1+nx^(n))^(1-1/n)+K`

C

`1/(n(n+1))(1+nx^(n))^(1+1/n)+K`

D

`1/(n+1)(1+nx^(n))^(1+1/n)+K`

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