1.

The inverse of the function \[f(x)=\frac{{{e}^{x}}-{{e}^{-x}}}{{{e}^{x}}+{{e}^{-x}}}+2\] is given by [Kurukshetra CEE 1996]

A.                    \[{{\log }_{e}}{{\left( \frac{x-2}{x-1} \right)}^{1/2}}\]
B.            \[{{\log }_{e}}{{\left( \frac{x-1}{3-x} \right)}^{1/2}}\]
C.                    \[{{\log }_{e}}{{\left( \frac{x}{2-x} \right)}^{1/2}}\]
D.            \[{{\log }_{e}}{{\left( \frac{x-1}{x+1} \right)}^{-2}}\]
Answer» C.                    \[{{\log }_{e}}{{\left( \frac{x}{2-x} \right)}^{1/2}}\]


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