\documentclass[letterpaper,10pt]{memoir}
  \usepackage[T1]{fontenc}
  \usepackage[utf8]{inputenc}
  \usepackage[english,francais]{babel}
  \usepackage[autolanguage]{numprint}
  \usepackage{vgmath,vgsets,amsmath,icomma}
  \usepackage{pslatex}
  \usepackage[sc]{mathpazo}
  \usepackage[noae]{Sweave}
  \usepackage{graphicx,color}
  \usepackage{longtable,lscape} % table de loi F
  \usepackage[absolute]{textpos}
  \usepackage{answers}
  \usepackage[alwaysadjust,defblank]{paralist}

  %%% Hyperliens
  \usepackage{hyperref}
  \definecolor{link}{rgb}{0,0,0.3}
  \hypersetup{
    pdftex,
    colorlinks,%
    citecolor=link,%
    filecolor=link,%
    linkcolor=link,%
    urlcolor=link}

 %%% Page titre
  \title{\HUGE
    \fontseries{ub}\selectfont Séries chronologiques \\[0.5\baselineskip]
    \huge\fontseries{m}\selectfont Exercices et solutions}
  \author{\LARGE François Pelletier \\[3mm]
    \large École d'actuariat \\ Université Laval \\[6mm]
  }
  \date{Première édition - Automne 2013}
  \newcommand{\ISBN}{}

  %%% Sous-figures
  \newsubfloat{figure}

  %%% Style des entêtes de chapitres
  \chapterstyle{hangnum}

  %%% Styles des entêtes et pieds de page
  \setlength{\marginparsep}{7mm}
  \setlength{\marginparwidth}{13mm}
  \setlength{\headwidth}{\textwidth}
  \addtolength{\headwidth}{\marginparsep}
  \addtolength{\headwidth}{\marginparwidth}

  %%% Style de la bibliographie
  \bibliographystyle{francais}

  %%% Options de babel
  \frenchbsetup{CompactItemize=false,%
    ThinSpaceInFrenchNumbers=true}
  \addto\captionsfrench{\def\tablename{{\scshape Tab.}}}
  \addto\captionsfrench{\def\figurename{{\scshape Fig.}}}

  %%% Associations entre les environnements et les fichiers
  \Newassociation{sol}{solution}{solutions}
  \Newassociation{rep}{reponse}{reponses}

  %%% Environnement pour les exercices
  \newcounter{exercice}[chapter]
  \newenvironment{exercice}{%
     \begin{list}{\bfseries \arabic{chapter}.\arabic{exercice}}{%
         \refstepcounter{exercice}
         \settowidth{\labelwidth}{\bfseries \arabic{chapter}.\arabic{exercice}}
         \setlength{\leftmargin}{\labelwidth}
         \addtolength{\leftmargin}{\labelsep}
         \setdefaultenum{a)}{i)}{}{}}\item}
     {\end{list}}

  %%% Environnement pour les réponses
  \renewenvironment{reponse}[1]{%
    \begin{list}{\bfseries #1}{%
        \settowidth{\labelwidth}{#1}
        \setlength{\leftmargin}{\labelwidth}
        \addtolength{\leftmargin}{\labelsep}
        \setdefaultenum{a)}{i)}{}{}}\item}
    {\end{list}}
  \renewcommand{\reponseparams}{{\thechapter.\theexercice}}

  %%% Environnement pour les solutions
  \renewenvironment{solution}[1]{%
    \begin{list}{\bfseries #1}{%
        \settowidth{\labelwidth}{#1}
        \setlength{\leftmargin}{\labelwidth}
        \addtolength{\leftmargin}{\labelsep}
        \setdefaultenum{a)}{i)}{}{}}\item}
    {\end{list}}
  \renewcommand{\solutionparams}{{\thechapter.\theexercice}}

  %%% Nouvelles commandes
  \newcommand{\cov}[1]{\mathrm{Cov} ( #1 )}
  \renewcommand{\Cov}[1]{\mathrm{Cov}\! \left( #1 \right)}
  \newcommand{\prob}[1]{\mathrm{Pr} [ #1 ]}
  \newcommand{\Prob}[1]{\mathrm{Pr}\! \left[ #1 \right]}
  \newcommand{\MSE}{\mathrm{MSE}}

  %%% Environnements pour le code S: police plus petite
  \RecustomVerbatimEnvironment{Sinput}{Verbatim}{fontshape=sl,fontsize=\small}
  \RecustomVerbatimEnvironment{Soutput}{Verbatim}{fontsize=\small}
  \RecustomVerbatimEnvironment{Scode}{Verbatim}{fontsize=\small}

  %%% Un petit peu d'aide pour la césure
  \hyphenation{con-fiance}
  \hyphenation{con-train-te}

\DeclareMathOperator{\sgn}{sgn}

\begin{document}

\frontmatter

\pagestyle{empty}
\include{pagetitre}

\pagestyle{companion}

\cleardoublepage
\tableofcontents

\mainmatter

\include{serie1-exercices}
\include{serie2-exercices}
\include{serie3-exercices}

\appendix
\include{solutions}
\pagestyle{empty}
\include{cc}
\cleardoublepage
\cleartoverso

\pagestyle{empty}
\bandeverso

\end{document}

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