15. Determine, quando possível, a matriz que re- sulta das m...

Determine, quando possível, a matriz que re- sulta das multiplicações indicadas a seguir.

$\begin{pmatrix} 2 & -1 & 3 & 1 \\ 0 & -2 & 5 & 4 \\ -3 & 1 & 0 & 6 \end{pmatrix} \cdot \begin{pmatrix} 1 & 2 \\ -1 & 3 \\ 0 & 4 \\ -2 & 1 \end{pmatrix}$

a)

$\begin{bmatrix} -1 & 0 \\ 5 & 7 \end{bmatrix} \cdot \begin{bmatrix} 0 & -1 & 2 \\ 4 & 0 & -5 \\ 7 & 0 & 1 \end{bmatrix}$ b)

$\begin{pmatrix} 3 \\ 1 \\ -2 \end{pmatrix} \cdot (2, 4, -1)$ c)

$15. Determine, quando possível, a matriz que re- sulta das multiplicações indicadas a seguir. $\begin{pmatrix} 2 & -1 & 3 & 1 \\ 0 & -2 & 5 & 4 \\ -3 & 1 & 0 & 6 \end{pmatrix} \cdot \begin{pmatrix} 1 & 2 \\ -1 & 3 \\ 0 & 4 \\ -2 & 1 \end{pmatrix}$ a) $\begin{bmatrix} -1 & 0 \\ 5 & 7 \end{bmatrix} \cdot \begin{bmatrix} 0 & -1 & 2 \\ 4 & 0 & -5 \\ 7 & 0 & 1 \end{bmatrix}$ b) $\begin{pmatrix} 3 \\ 1 \\ -2 \end{pmatrix} \cdot (2, 4, -1)$ c)$

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