\documentclass[11pt]{beamer}
\usetheme{Copenhagen}
\usepackage[utf8]{inputenc}
\usepackage[francais]{babel}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\author{Mamouni My Ismail}
\title{Devoir Libre 2 en \LaTeX}
\setbeamercovered{transparent} 
\setbeamertemplate{navigation symbols}{} 
\logo{\includegraphics[scale=0.2]{../../../../../media/myismail/Sauvegarde/Smail/Doctorat/GDR/images/LogoMen.jpg}}
\institute{CRMEF Rabat} 
\date{Vendredi 31 Octobre 2014} 
\subject{Examples} 

\usepackage{arabtex}
\begin{document}

\begin{frame}
\titlepage
\end{frame}

\begin{frame}
\tableofcontents
\end{frame}
\section{Insérer}
\subsection{Insérer Image}
\begin{frame}{Insérer image}
\includegraphics[scale=0.5]{../../../../../media/myismail/Sauvegarde/Smail/Doctorat/GDR/images/maroc.jpg} 
\end{frame}

\subsection{Insérer Texte}
\begin{frame}{Insérer Texte}
\begin{center}
\textbf{\textbf{{\LARGE Morocco}}} 
\end{center}
officially the \textit{Kingdom of Morocco}, is a country in the \textit{Maghreb} region of \textit{North Africa}. Geographically, Morocco is characterized by a rugged mountainous interior and large portions of desert. It is one of only three countries (with Spain and France) to have both Atlantic and Mediterranean coastlines. 
\end{frame}
\subsection{Texte Arabe}
\begin{frame}

\begin{arabtex}
\begin{flushleft}
bismi al-llahi al-rra.hmani al-rra.hImi
\end{flushleft}
\begin{center}
rabbiy 'i^sra.h liy .sadriy wa yassir liy 'amriy wa '.hlul `uqdaT min lisAniy yafqahwuA qawliy 
\end{center}

\begin{flushright}
.sadaqa al-llahu al-`a.zIm
\end{flushright}
\end{arabtex}
\end{frame}
\section{Math}
\subsection{Equations}
\begin{frame}{Exercice}
Soit $u\in \mathbb{C}\mathcal - \{1\}$ et $z\in \mathbb{C}.$ Montrer que 
$$\dfrac{z-u\overline{z}}{1-u}\in \mathbb{R}\Leftrightarrow \left\vert u\right\vert =1$$
\end{frame}
\subsection{Théorèmes, Def, examples, ...}
\begin{frame}{blocks}
\begin{block}{Un bloc normal}
  Texte du block 
 \end{block}

 \begin{alertblock}{Un bloc très alerte}
  Texte du block 
 \end{alertblock}

 \begin{exampleblock}{Un bloc exemplaire}
  Insérer Exemple 
 \end{exampleblock}
\end{frame}

\end{document}