Practice problem
Solve [abcdefghi]∗[123]\begin{bmatrix}a&b&c\\d&e&f\\g&h&i\end{bmatrix}*\begin{bmatrix}1\\2\\3\end{bmatrix}adgbehcfi∗123
[a+2d+3gb+2e+3hc+2f+3i]\begin{bmatrix}a+2d+3g\\b+2e+3h\\c+2f+3i\end{bmatrix}a+2d+3gb+2e+3hc+2f+3i
[a+2b+3cd+2e+3fg+2h+3i]\begin{bmatrix}a+2b+3c\\d+2e+3f\\g+2h+3i\end{bmatrix}a+2b+3cd+2e+3fg+2h+3i
[a+d+g2(b+e+h)3(c+f+i)]\begin{bmatrix}a+d+g\\2(b+e+h)\\3(c+f+i)\end{bmatrix}a+d+g2(b+e+h)3(c+f+i)
These cannot be multiplied.
Type a concept, like “slope” or “photosynthesis”.
