Questions in fun-lim

Select	Question
	If $y=f(x)=\frac{x+2}{x-1}$, then $x=$
	Which of the following functions is inverse of itself
	The inverse of the function $f(x)=\frac{{{e}^{x}}-{{e}^{-x}}}{{{e}^{x}}+{{e}^{-x}}}+2$ is given by
	If the function $f:[1,\ \infty )\to [1,\ \infty )$ is defined by $f(x)={{2}^{x(x-1)}},$ then ${{f}^{-1}}$(x) is
	If $f(x)=3x-5$, then ${{f}^{-1}}(x)$
	If $f:IR\to IR$ is defined by $f(x)=3x-4$, then ${{f}^{-1}}:IR\to IR$ is
	If $f(x)=\frac{x}{1+x}$, then ${{f}^{-1}}(x)$ is equal to
	Which of the following function is inverse function
	Let $f(\theta )=\sin \theta (\sin \theta +\sin 3\theta )$, then $f(\theta )$
	The inverse of the function $\frac{{{10}^{x}}-{{10}^{-x}}}{{{10}^{x}}+{{10}^{-x}}}$ is