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+\documentclass{article}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{lmodern}
+\usepackage{amsmath}
+\usepackage{tkz-tab}
+
+\parindent=0pt
+
+\begin{document}
+\begin{tikzpicture}
+\tikzset{double style/.style = {double,double distance=1pt}}
+\tkzTabInit[lgt=2,espcl=1]
+{$x$ /1,
+$x^2-3x+2$ /1,
+$\ln (x^2-1)$ /1,
+$E(x)$ /1}%
+{$-\infty$ ,$-\sqrt{2}$, $-1$ , $1$ ,$\sqrt{2}$ , $2$ , $+\infty$}%
+\tkzTabLine{ , + , t , + , t , + , z , - , t , - , z , + , }
+\tkzTabLine{ , + , z , - , d , h , d , - , z , + , t , + , }
+\tkzTabLine{ , + , z , - , d , h , d , + ,z , - , z , + , }
+\end{tikzpicture}
+\end{document}
+
+
+% latin1
+% pdflatex
+% Alain Matthes \ No newline at end of file