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Source de c-d-c.tex

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$$\vcenter {\offinterlineskip
    \def \cc#1{ \hfil #1 \hfil }
    \halign {
    \tvg \cc {$#$}& #\tv & \cc {$#$} & \cc {$#$}& \cc {$#$}&
\cc {$#$}& \cc {$#$}& \cc {$#$}& \cc{$#$} &#\tv
    \cr
    \noalign {\hrule}
        x&& 0&& 2&& 4&&+\infty&
    \cr
    \noalign {\hrule}
    f'(x)&&& +& 0& - & 0 & +&&
    \cr
    \noalign {\hrule}
    \buuucenter {$f(x)$} &&\down{1} &\bbrightuuparrow & \bbuup {$e^3$}
    &\bbrightddownarrow &\down {$-2$} & \bbrightuuparrow &
    \bbuup{8}&
    \cr
    \noalign {\hrule}
    }}
$$