\documentclass[a4paper,12pt]{article}
\newcommand\ds{\displaystyle}
\usepackage{epsfig}
\begin{document}

\parindent=0pt

QUESTION

Draw the graph of the function $\cosh^{-1}x$, showing carefully
the domain and range of the function.


ANSWER

\begin{center}
\epsfig{file=160-2000-2.eps, width=45mm} \ \ \
\epsfig{file=160-2000-3.eps, width=45mm}
\end{center}

domain $x \geq 1$\hspace{1.5cm}range $y\geq 0$


\end{document}