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Which of the following functions is the ...

Which of the following functions is the inverse of itself? (a) `f(x)=(1-x)/(1+x)` (b) `f(x)=5^(logx)` (c) `f(x)=2^(x(x-1))` (d) None of these

A

`f(x)=(1-x)/(1+x)`

B

`g(x)=5^("log x")`

C

`h(x)=2^(x(x-1))`

D

none of these

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The correct Answer is:
A
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