Question

me ajudem pfv!!!!!!!​

Answer 1

Resposta:

A + B - C = $\left[\begin{array}{ccc}1&2&3\\-4&5&6\\4&6&8\\\end{array}\right]$    +$\left[\begin{array}{ccc}-7&-8&9\\12&6&5\\8&7&4\end{array}\right]$  -  $\left[\begin{array}{ccc}2&3&4\\6&7&1\\2&8&1\end{array}\right]$

=  $\left[\begin{array}{ccc}-8&-9&16\\2&4&10\\10&5&11\end{array}\right]$

                 

8) B + C=$\left[\begin{array}{ccc}-9&-11&13\\6&-1&4\\6&-1&3\end{array}\right]$

9)At=$\left[\begin{array}{ccc}1&-4&4\\2&5&6\\3&6&8\end{array}\right]$