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\input{preamble-standalone.ltx}
\begin{document}
% Ex. No. 29 (Section 8.4 : Surface et hachures)
\begin{tikzpicture}[scale=2]
\tkzInit[xmin=-3,xmax=4,ymin=-2,ymax=4]
\tkzGrid(-3,-2)(4,4)
\tkzDrawXY
\tkzFct[domain = -2.15:3.2]{(2+\x)*exp(-\x)}
\tkzDrawArea[pattern=north west lines,domain =-2:2]
\tkzDrawTangentLine[draw,color=blue](0)
\tkzDrawTangentLine[draw,color=blue](-1)
\tkzDefPointByFct(2) \tkzGetPoint{C}
\tkzDefPoint(2,0){B}
\tkzDrawPoints(B,C) \tkzLabelPoints[above right](B,C)
\tkzRep
\end{tikzpicture}
\end{document}
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