Question

dadas as matriz a=[2 4 8 12] b=[3 6 9 12] o resultado de 2a-b​ será?

Answer 1

$2a-b~~=~~2~.~\left[\begin{array}{cccc}2&4&8&12\end{array}\right]~-~\left[\begin{array}{cccc}3&6&9&12\end{array}\right] \\\\\\2a-b~~=~~\left[\begin{array}{cccc}2\,.\,2&2\,.\,4&2\,.\,8&2\,.\,12\end{array}\right]~-~\left[\begin{array}{cccc}3&6&9&12\end{array}\right]$

$2a-b~~=~~\left[\begin{array}{cccc}4&8&16&24\end{array}\right]~-~\left[\begin{array}{cccc}3&6&9&12\end{array}\right]\\\\\\2a-b~~=~~\left[\begin{array}{cccc}4-3&8-6&16-9&24-12\end{array}\right]\\\\\\\boxed{2a-b~~=~~\left[\begin{array}{cccc}1&2&7&12\end{array}\right]}$