\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Calculer la multiplication par un scalaire :
$$ 5\begin{pmatrix} 2 \\ 0 \\ -3 \\ 1 \end{pmatrix} = \begin{pmatrix}\input{14181}{}{3em}{2em}{}{} \\ \input{24181}{}{3em}{2em}{}{} \\ \input{34181}{}{3em}{2em}{}{} \\ \input{44181}{}{3em}{2em}{}{} \end{pmatrix}$$