if f(x) = \log (\frac{1+x}{1-x} ) then f ( \frac{2x}{1+x^2}) =

CA CPT 2013 June Question Paper Quantitative Aptitude for online practice

Question : 18 of 50

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f(x) = log ({1+x}/{1-x} )

then

f ( {2x}/{1+x^2}) =

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