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%
% tkz-euclide (14/01/2011)
%
% Coding (utf8) Creator (TeX) Producer (pdfeTeX) 
% Author Alain Matthes
\input{tkzfctpreamble.ltx}

\begin{document}

\begin{tikzpicture}[xscale=3,yscale=2]
  \tkzInit[xmin=-2,xmax=2,xstep=1,
           ymin=-8,ymax=24,ystep=8]
  \tkzGrid
  \tkzAxeXY
  \global\edef\tkzFctLast{3.0-1.3125*x^5-2.5*x^3}
  \foreach \va in {-1.5,-1.4,...,1}{%
      \tkzDefPointByFct[draw](\va)}
\end{tikzpicture}

\end{document}