%@P:tableau \setlength{\TabTitreL}{1cm} \begin{MonTableau}{2}{6.95}{1.2} \TabNewCol{0} \rTabPut{B}{-0.5}{0.25}{$x$} \rTabPut{B}{-0.5}{0.25}{\TabTitre{sgn.}{g'(x)}} \rTabPut{B}{-0.5}{0.25}{\TabTitre{var.}{g}} \TabNewCol{0} \rTabPut{Bl}{0.1}{0.25}{$-\infty$} \rTabPut{Bl}{0.1}{0.7}{} \rTabPut{Bl}{0.1}{0.7}{$+\infty$} \TabNewCol{0.25} \rTabPut{B}{0}{0.25}{$-\frac{1}{2}$} \rTabPut{B}{0}{.4}{$0$} \rTabPut{B}{0}{.5}{$\frac{27}{4}$} \TabNewCol{.5} \rTabPut{Br}{-.1}{0.25}{} \rTabPut{Br}{-.1}{0.25}{} \rTabPut{Br}{-.1}{0.7}{$+\infty$} \TabNewCol{.5} \rTabPut{B}{0}{0.25}{$0$} \rTabPut[3]{B}{0}{0.25}{} \rTabPut[3]{B}{0}{0.25}{} \TabNewCol{.5} \rTabPut{Bl}{.1}{0.25}{} \rTabPut{Bl}{.1}{0.25}{} \rTabPut{Bl}{.1}{0.1}{$-\infty$} \TabNewCol{0.75} \rTabPut{B}{0}{0.25}{$1$} \rTabPut{B}{0}{.4}{$0$} \rTabPut{B}{0}{.4}{} \TabNewCol{1} \rTabPut{Br}{-0.1}{0.25}{$+\infty$} \rTabPut{Br}{-0.1}{0.7}{} \rTabPut{Br}{-0.1}{0.7}{$+\infty$} \TabFleche{B2}{C2} \TabFleche{C2}{D2} \TabFleche{F2}{H2} \rput(.125,.5){$-$} \rput(.375,.5){$+$} \rput(.625,.5){$+$} \rput(.875,.5){$+$} \rput(.750,1.52){\TabZ} \end{MonTableau}