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

if `f(x)=log_(2)((1-x)/(1+x))` then `f((2x)/(1+x^(2)))` is equal to (A) `f(x)` (B) `2f(x)` (C) `-2f(x)` (D) `(f(x))^(2)`

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