If f(x)=x−1x+1, x≠−1 then show that f(f(x))=−1x, where x≠0). – InterviewSolution

1.	If f(x)=x−1x+1, x≠−1 then show that f(f(x))=−1x, where x≠0).
Answer» If $f (x) = \frac{x - 1}{x + 1}, x \neq - 1$ then show that $f (f (x)) = \frac{- 1}{x}$ , where $x \neq 0)$ .

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