\solution{4.1}{corriges/exercice-4.1.tex}
\solution{4.2}{corriges/exercice-4.2.tex}
\solution{4.3}{corriges/exercice-4.3.tex}
\solution{4.4}{corriges/exercice-4.4.tex}
\solution{4.5}{corriges/exercice-4.5.tex}
\solution{4.6}{corriges/exercice-4.6.tex}
\solution{4.7}{corriges/exercice-4.7.tex}
\solution{4.8}{corriges/exercice-4.8.tex}
\solution{4.9}{corriges/exercice-4.9.tex}
\solution{4.10}{corriges/exercice-4.10.tex}
\solution{4.11}{corriges/exercice-4.11.tex}
\solution{4.12}{corriges/exercice-4.12.tex}
\solution{4.13}{corriges/exercice-4.13.tex}
\solution{4.14}{corriges/exercice-4.14.tex}
\solution{4.15}{corriges/exercice-4.15.tex}
\solution{4.16}{corriges/exercice-4.16.tex}
\solution{4.17}{corriges/exercice-4.17.tex}
\solution{4.18}{corriges/exercice-4.18.tex}