\begin{exercice}
    Soit ci-dessous la courbe représentative d'une fonction $f$.
\begin{center}
\psset{xunit=1.cm,yunit=1.cm,algebraic=true}
\begin{pspicture*}(-5.25,-1.2)(5.25,1.4)
\psgrid[subgriddiv=1,linewidth=0.5pt,gridcolor=A3,subgridcolor=A3,gridlabels=0pt](-6,-2)(6,3)
\psaxes[linewidth=0.8pt,Dx=1,Dy=1,ticksize=-2pt]{->}(0,0)(-5.25,-1.2)(5.25,1.4)
%\psaxes[linewidth=0.5pt,Dx=10,Dy=10]{->}(0,0)(1,1)
  \rput[0](1.9,2.5){\textcolor{B2}{$\mathscr{C}$}}
\psplot[linecolor=B2,plotpoints=5000,linewidth=0.8pt]{-5.25}{-1.05}{((x^2+x)/(x^2-1)-(x^2-x)/(-x^2+1))/8}
\psplot[linecolor=B2,plotpoints=5000,linewidth=0.8pt]{-0.95}{0}{((x^2+x)/(x^2-1)-(x^2-x)/(-x^2+1))/8}
\psplot[linecolor=B2,plotpoints=5000,linewidth=0.8pt]{0}{0.95}{((x^2+x)/(x^2-1)-(x^2-x)/(-x^2+1))/8+0.13}
\psplot[linecolor=B2,plotpoints=5000,linewidth=0.8pt]{2.05}{5.25}{(((x-1)^2+x-1)/((x-1)^2-1)-((x-1)^2-x+1)/(-(x-1)^2+1))/8}
\psline[linecolor=B2,linewidth=0.8pt](1.2,-1.2)(1.8,1.4)
\rput(0,0){\textcolor{Blanc}{$\bullet$}} \rput(0,0){\textcolor{B2}{$\circ$}}
\rput(0,0.13){\textcolor{B2}{$\bullet$}}
\end{pspicture*}
\end{center}
Il est certain que la fonction $f$ n'est pas continue :
      \begin{ChoixQCM}{4}
      \item en $-1$
      \item en $0$
      \item en $2$
      \item en $6$
      \end{ChoixQCM}
      \begin{corrige}
     \reponseQCM{ab}
   \end{corrige}
    \end{exercice}

