यदि f(x)=log((1-x)/(1+x)), तो सिद्ध कीजि...

यदि `f(x)=log((1-x)/(1+x))`, तो सिद्ध कीजिए कि `f(a)+f(b)=f((a+b)/(1+ab))`.

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The correct Answer is:

`rArr" "f(a)+f(b)=f((a+b)/(1+ab))`.

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