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\input{preamble-standalone.ltx}
\begin{document}
% Ex. No. 27 (Section 8.2 : Naissance de la fonction logarithme népérien)
\begin{tikzpicture}[scale=2]
\tkzInit[xmin=0,xmax=3,xstep=1,
ymin=-2,ymax=2,ystep=1]
\tkzGrid
\tkzAxeXY
\tkzFct[domain= 0.4:3]{1./x}
\tkzDefPointByFct(1)
\tkzGetPoint{A}
\tkzDefPointByFct(2)
\tkzGetPoint{B}
\tkzLabelPoints[above right](A,B)
\tkzDrawArea[color=blue!30,
domain = 1:2]
\tkzFct[domain = 0.5:3]{log(x)}
\tkzDrawArea[color=red!30,
domain = 1:2]
\tkzPointShowCoord(A)
\tkzPointShowCoord(B)
\tkzDrawPoints(A,B)
\end{tikzpicture}
\end{document}
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