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+%% 
+%%  A DANTE-Edition example
+%% 
+%%  Example 28-02-3 on page 523.
+%% 
+%%  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{375.57637pt}
+\setlength\parindent{0pt}
+
+\usepackage{pstricks,pst-func}
+
+\begin{document}
+\psset{yunit=0.4cm,xunit=0.8cm}
+\begin{pspicture*}(-2,-5)(4,10)
+ \psaxes[Dy=2,labelFontSize=\scriptstyle]{->}(0,0)(-3,-5)(4,10)
+ \psset{linewidth=1pt,dotstyle=x}
+ \psPolynomial[dotscale=2,Derivation=1,coeff=2 -1 -1 .5 -.1 .025,linecolor=red]{-2}{4}
+ \psPolynomial[zeroLineTo=1,markZeros,dotscale=2,coeff=2 -1 -1 .5 -.1 .025,
+               linecolor=blue]{-2}{4}
+ \rput[lb](4,8){$g(x)$}
+\end{pspicture*}
+\quad
+\begin{pspicture*}(-2,-5)(4,10)
+ \psaxes[Dy=2,labelFontSize=\scriptstyle]{->}(0,0)(-3,-5)(4,10)
+ \psset{linewidth=1pt}
+ \psPolynomial[markZeros,dotscale=2,coeff=2 -1 -1 .5 -.1 .025,linecolor=cyan]{-2}{4}
+ \rput[lb](4,8){$g(x)$}
+\end{pspicture*}
+\end{document}