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If f(x) = (a-x^n)^1/n, a gt 0 , n is a p...

If `f(x) = (a-x^n)^1/n, a gt 0` , n is a postive integer then` f[f(x)]=`

A

x

B

`x^2`

C

`x^3`

D

`x^n`

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A
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