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If f(x) = log ((1+x)/(1-x)), then f((2x)...

If `f(x) = log ((1+x)/(1-x))`, then `f((2x)/(1+x^(2)))` is equal to

A

`2f(x)`

B

`f(2x)`

C

`f(x^(2))`

D

`f(2x^(2))`

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The correct Answer is:
A
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