\documentclass{article} \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} \usepackage{lmodern} \usepackage{amsmath} \usepackage{tkz-tab} \newcommand*{\va}{\colorbox{red!50} {$\scriptscriptstyle V_a$}} \newcommand*{\vb}{\colorbox{blue!50} {$\scriptscriptstyle V_b$}} \newcommand*{\vbo}{\colorbox{blue!50} {$\scriptscriptstyle V_{b1}$}} \newcommand*{\vbt}{\colorbox{yellow!50}{$\scriptscriptstyle V_{b2}$}} \newcommand*{\vc}{\colorbox{gray!50} {$\scriptscriptstyle V_c$}} \newcommand*{\vd}{\colorbox{magenta!50}{$\scriptscriptstyle V_d$}} \newcommand*{\ve}{\colorbox{orange!50} {$\scriptscriptstyle V_e$}} \parindent=0pt \begin{document} \begin{tikzpicture} \tkzTabInit[lgt=3,espcl=5]{ $x$/1,$f''(x)$/1,$f'$/3,$f$/3 }% { $a$ , $d$ ,$e$} \tkzTabLine{ z,+ ,z,- ,z } \tkzTabVar {-/\va ,+/\vd , -/ \ve} \tkzTabVal[draw,remember=vb]{1}{2}{0.333}{b}{$1$} \tkzTabVal[draw,remember=vc]{1}{2}{0.666}{c}{$2$} \tkzTabVar{-/$-\infty$ ,R/ , +/ $+\infty$} \tkzTabVal[draw]{1}{3}{0.5}{}{$0$} \draw[opacity=0.5,fill=red!40] (vb) circle(3ex); \draw[opacity=0.5,fill=blue!40] (vc) circle(3ex); \end{tikzpicture} \end{document} % latin1 % pdflatex % Alain Matthes