%@P:tableau \setlength{\TabTitreL}{1cm} \begin{MonTableau}{3}{6.99}{1} \TabNewCol{0} \rTabPut{B}{-0.5}{0.25}{$x$} \rTabPut{B}{-0.5}{0.40}{$\varphi''$} \rTabPut{B}{-0.5}{0.40}{$\varphi'$} \rTabPut{B}{-0.5}{0.40}{$\varphi$} \TabNewCol{0} \rTabPut{Bl}{0.1}{0.25}{$-1$} \rTabPut[3]{Bl}{0.1}{0.1}{} \rTabPut[3]{Bl}{0.1}{0.7}{$+\infty$} \rTabPut{Bl}{0.1}{0.4}{$\frac{3}{8}$} \TabNewCol{.333} \rTabPut{B}{0}{0.25}{$3$} \rTabPut{B}{0}{0.25}{} \rTabPut[1]{B}{0}{0.25}{} \rTabPut{B}{0}{0.65}{$\frac{27}{8}$} \TabNewCol{.667} \rTabPut{B}{0}{0.25}{$8$} \rTabPut{B}{0}{0.25}{} \rTabPut{B}{0}{0.25}{} \rTabPut[1]{B}{0}{0.25}{} \TabNewCol{1} \rTabPut{Br}{-0.1}{0.25}{$+\infty$} \rTabPut{Br}{-0.1}{0.7}{} \rTabPut{Br}{-0.1}{0.1}{$-\infty$} \rTabPut{Br}{-0.1}{0.1}{$-\infty$} \TabFleche{B2}{E2} \TabFleche{B3}{C3}\TabFleche{C3}{E3} \rput(.5,.5){\Mathbold{-}} \rput(.1667,1.5){\Mathbold{+}}\rput(.333,1.5){\TabZ} \rput(.6667,1.5){\Mathbold{-}} \rput(.3333,2.75){\Mathbold{+}}\rput(.6667,2.5){\TabZ} \rput(.8333,2.5){\Mathbold{-}} \end{MonTableau}