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%%
%% A DANTE-Edition example
%%
%% Example 28-02-1 on page 521.
%%
%% Copyright (C) 2011 Herbert Voss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{153.70511pt}
\setlength\parindent{0pt}
\usepackage{pstricks,pst-func}
\begin{document}
\psset{yunit=0.3cm,xunit=0.75cm}
\begin{pspicture*}(-2.5,-5)(5,10)
\psaxes[Dy=2]{->}(0,0)(-2.5,-5)(5,10)
\psset{linewidth=1.5pt}
\psPolynomial[coeff=6 3 -1,
linecolor=red]{-3}{5}
\psPolynomial[coeff=2 -1 -1 .5 -.1 .025,
linecolor=blue]{-2}{4}
\psPolynomial[coeff=-2 1 -1 .5 .1 .025 .2,
linecolor=magenta]{-2}{4}
\rput[lb](4,4){\textcolor{red}{$f(x)$}}
\rput[lb](4,8){\textcolor{blue}{$g(x)$}}
\rput[lb](2,4){\textcolor{magenta}{$h(x)$}}
\end{pspicture*}
\end{document}
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