\begin{exercice}
 Même consigne qu'à l'exercice \RefExercice{1SA3_E_lectures_graphiques}.
 \begin{colenumerate}{2}
  \item $a = -3,5$
  \item $a = -2$
  \item $a = -1$
  \item $a = 2$
 \end{colenumerate}
  \vspace{-5mm}

 \begin{center}
  \begin{tikzpicture}[general, xscale=0.9, yscale=0.9]
   \draw [quadrillage] (-5,-1)grid (4,5);
   \axeX{-5}{4}{1}
   \axeY{-1}{5}{1}
   \origine
   \pointFigure{-3.5}{3}{A}{color=D1, above right};
   \pointFigure{-2}{0.5}{B}{color=D1, above};
   \pointFigure{-1}{0.5}{C}{color=D1, below right};
   \pointFigure{2}{1.5}{D}{color=D1, above right};
   \draw [domain=-5:-3.5, color=A1, epais, smooth] plot(\x,{-1.925*\x*\x*\x-26.22*\x*\x-116.778*\x-167.074});
   \draw [domain=-3.5:-2, color=A1, epais, smooth] plot(\x,{-0.296*\x*\x*\x-1.11*\x*\x-0.889*\x+0.796});
   \draw [domain=-2:-1, color=A1, epais, smooth] plot(\x,{2.5*\x*\x*\x+12.5*\x*\x+20*\x+10.5});
   \draw [domain=-1:2, color=A1, epais, smooth] plot(\x,{0.037*\x*\x*\x-0.722*\x*\x+0.944*\x+2.203});
   \draw [domain=2:4, color=A1, epais, smooth] plot(\x,{-0.1725*\x*\x*\x+2.13*\x*\x-7.95*\x+10.26});
   \draw [domain=-4:-23/8, color=C1, epais, smooth] plot(\x,{-4*\x-11});
   \draw [domain=-4:0, color=C1, epais, smooth] plot(\x,{0.5});
   \draw [domain=-8/5:0.5, color=C1, epais, smooth] plot(\x,{2.5*\x+3});
   \draw [domain=0.5:3.5, color=C1, epais, smooth] plot(\x,{-1.5*\x+9/2});
   \draw (3,1.5) [color=A1] node [right]{{\boldmath $\mathcal{C}_f$}};
  \end{tikzpicture}
 \end{center}
\end{exercice}