1. If f(x) = x/x-1 , then f(a)/f(a+1) is equal to.

Dear ROHIT,

Ans:- f(x)=x/(x-1)

 f(x+1)=(x+1)/x

Hence  f(a)/f(a+1)=a²/(a² - 1)

                         =f(a²) (Ans)

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