1.

If \[f(x)=\frac{x}{1+x}\], then \[{{f}^{-1}}(x)\] is equal to [AMU 1999]

A.                    \[\frac{(1+x)}{x}\]
B.            \[\frac{1}{(1+x)}\]
C.                    \[\frac{(1+x)}{(1-x)}\]
D.            \[\frac{x}{(1-x)}\]
Answer» E.


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