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%%
%% A DANTE-Edition example
%%
%% Example 28-02-4 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{201.70511pt}
\setlength\parindent{0pt}
\usepackage{pstricks,pst-func}
\begin{document}
\psset{xunit=1.25,yunit=0.75}
\begin{pspicture*}(-4,-5)(4,5)
\psaxes[labelFontSize=\scriptstyle]{->}(0,0)(-4,-5)(4,5)
\psset{dotscale=2,dotstyle=x,zeroLineStyle=dotted,zeroLineWidth=1pt}
\psPolynomial[markZeros,linewidth=2pt,coeff=-1 1 -1 0 0.15]{-4}{3}
\psPolynomial[markZeros,linecolor=red,linewidth=1pt,linestyle=dashed,
coeff=-1 1 -1 0 0.15,Derivation=1,zeroLineTo=0]{-4}{3}
\psPolynomial[markZeros,linecolor=magenta,linewidth=1pt,linestyle=dotted,
coeff=-1 1 -1 0 0.15,Derivation=2,zeroLineTo=0]{-4}{3}
\end{pspicture*}
\end{document}
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