Question

U=(3,-1) e v=(2,-2), determine w =3u - v

Answer 1

$u=\left[\begin{array}{c}3&-1\end{array}\right]\ e\ v=\left[\begin{array}{c}2&-2\end{array}\right]\\\\w=3u-v\\\\w=3\left[\begin{array}{c}3&-1\end{array}\right]-\left[\begin{array}{c}2&-2\end{array}\right]=\left[\begin{array}{c}9&-3\end{array}\right]-\left[\begin{array}{c}2&-2\end{array}\right]=\left[\begin{array}{c}7&-1\end{array}\right]$