\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Déterminer la matrice opposée de \(A = \begin{pmatrix} 9 & -2 & 0 & -11 \end{pmatrix}\).
\(-A = \begin{pmatrix} \input{14131}{}{3em}{2em}{}{} & \input{24131}{}{3em}{2em}{}{} & \input{34131}{}{3em}{2em}{}{} & \input{44131}{}{3em}{2em}{}{} \end{pmatrix}\)