E
Editor
Sep 18, 2022
Which pair of matrices are comfortable for multiplication?
Difficulty: Easy
A:
$\begin{bmatrix}1\\2\\3\end{bmatrix}\begin{bmatrix}5 & 6 &7\\\end{bmatrix}$
B:
$\begin{bmatrix}5 & 6 &7\\\end{bmatrix}\begin{bmatrix}2&3\\\end{bmatrix}$
C:
$\begin{bmatrix}1+2\\-2+5 \end{bmatrix}\begin{bmatrix}3+5\\6+7 \end{bmatrix}$
D:
$\begin{bmatrix}1&7\\3&-7 \end{bmatrix}\begin{bmatrix}2&-5&5\\4&-1&2\\4&-3&2 \end{bmatrix}$
ID: 63273dbaca83163ac3a11bcb