Questão 5 - Indique com um \( X \) as matrizes que podem ser multiplicadas. \( \begin{array}{ll}\text { a) } \boldsymbol{A}_{m \times n}=\left[\begin{array}{lll}3 & 1 & 1\end{array}\right] \text { e } \boldsymbol{B}_{m \times n}=\left[\begin{array}{l}2 \\ 2 \\ 0\end{array}\right] & \text { d) } \boldsymbol{C}_{m \times n}=\left[\begin{array}{lll}1 & 0 & 1 \\ 0 & 1 & 0 \\ 1 & 0 & 1\end{array}\right] \text { e } \quad B_{m \times n}=\left(\begin{array}{l}2 \\ 2 \\ 0\end{array}\right) \\ \text { b) } \boldsymbol{B}_{m \times n}=\left[\begin{array}{l}\frac{1}{2} \\ 3\end{array}\right] \text { e } \mathcal{J}_{m \times n}=\left(\begin{array}{ll}3 & 1 \\ 2 & 2 \\ 1 & 3\end{array}\right) & \text { e) } B_{m \times n}=\left[\begin{array}{l}2 \\ 2 \\ 0\end{array}\right] \text { e } \boldsymbol{A}_{m \times n}=\left[\begin{array}{lll}3 & 1 & 1\end{array}\right] \\ \left.\text { c) } \boldsymbol{\varepsilon}_{m \times n}=\left\lvert\, \begin{array}{cc}3 & \sqrt[3]{4} \\ \cos 30^{\circ} & -5\end{array}\right.\right] \text { e } \boldsymbol{G}_{m \times n}=\left[\begin{array}{ll}3 & -5\end{array}\right] & \end{array} \)
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