3. Let $A = \begin{bmatrix} 1 & -1 & -2 \ 2 & 0 & 1 \ -3 & -1 & 0 \end{bmatrix}$, $B = \begin{bmatrix} 0 & -4 & -3 \ 1 & 1 & -1 \ -2 & -3 & -4 \end{bmatrix}$, $C = \begin{bmatrix} 1 \ -2 \ -1 \end{bmatrix}$, $D = \begin{bmatrix} 2 & x & -2 \end{bmatrix}$. Find (if possible): i. $3B - 3A$ ii. $AC$ iii. $(AC)^T$ iv. x if C is orthogonal to D.
Added by Lawrence M.
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A = [1 2] [1 2] B = [0 1 -1 0] [4 3 1 1] D = [2x-2] Show more…
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