1.

यदि `f(x)=(x-1)/(x+1)`, तो `f(2x)` बराबर है -A. `(1+f(x))/(3+f(x))`B. `(1+3f(x))/(3+f(x))`C. `(3+f(x))/(1+f(x))`D. `(1+3f(x))/(3-f(x))`

Answer» Correct Answer - B


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