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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