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\newcommand{\ch}{Chapitre 1}
\newcommand{\Ch}{}	
\newcommand{\Cl}{TG6}	
\newcommand{\Annee}{2012-2013}	
\newcommand{\Int}{Interrogation n$^{\circ}$ 1}
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%\usepackage[french,lined,boxed,commentsnumbered]{algorithm2e}

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\begin{document}
 
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%	Cadre jaune
\textbf{Nom : }$\dots\dots\dots\dots\dots$ \hskip20mm \textbf{Pr\'enom : }$\dots\dots\dots\dots\dots$  \hfill \textbf{Classe : TG6}\\
\Cj{ \Int }


\Exop{Démontrer par récurrence que la somme des $n$ premiers entiers non nuls vaut $\dfrac{n(n+1)}{2}$.\\
}








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\textbf{Nom : }$\dots\dots\dots\dots\dots$ \hskip20mm \textbf{Pr\'enom : }$\dots\dots\dots\dots\dots$  \hfill \textbf{Classe : TG6}\\
\Cj{ \Int }
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\Exop{
On note $(u_n)_{n\in\N}$ la suite définie par $u_0=0$ et $u_{n+1}=\sqrt{u_n+6}$.\\
Démontrer par récurrence que $\forall n \in \N$ on a $0 \leq u_n \leq 3$.
}








\end{document}

 