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\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 14 (Section  5.4 : Placer des points sans courbe)

\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}