\begin{exercice}Même consigne que l'exercice \RefExercice{2G4_construiresomme}.

\begin{center}
\begin{tikzpicture}[general, scale=0.5]
\draw [quadrillage] (-5,-5) grid (5,5);
\axeOI{-5}{5}
\axeOJ{-5}{5}
\origineO
\foreach \N/\x/\y in {A/-3/4}
{\draw (\x,\y) node[right] {$\N$};
\draw (\x,\y) node { $+$};}
\draw[->, color=A1,epais] (-4,-4)--(2,-4);
\draw[color=A1] (-1,-4) node[below] {{\boldmath $\vv u$}};
\draw[->, color=C1,epais] (4,-3)--(-4,3);
\draw[color=C1] (-3,1) node {{\boldmath $\vv v$}};
\end{tikzpicture}
\end{center}
\end{exercice}
