If `f(x)=log((1+x)/(1-x))` and then `f((2x)/(1+x^2))` is equal to `{f(x)}^2` (b) `{f(x)}^3` (c) 2`f(x)` (d) `3f(x)`

Explanation

To solve the problem, we need to evaluate \( f\left(\frac{2x}{1+x^2}\right) \) and compare it with the options given.

Given:
\[ f(x) = \log\left(\frac{1+x}{1-x}\right) \]

We need to find:
\[ f\left(\frac{2x}{1+x^2}\right) \]

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