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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}[scale=2.5]
\tkzInit[xmin=-1,xmax=4,ymin=0,ymax=5]
\tkzGrid
\tkzAxeXY
\tkzFct[domain = -.5:4]{ 4*x-x**2+4/(x**2+1)**2}
\tkzFct[domain = -.5:4]{x-1+4/(x**2+1)**2}
\tkzDrawAreafg[color=green,domain = 1:4]
\tkzDrawAreafg[pattern=north west lines,domain = -.5:1]
\tkzRep
\tkzText(2.5,4.5){$C_f$}
\tkzText(2.5,1){$C_g$}
\end{tikzpicture}%
\end{document}
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