Question

dados as matrizes a={(1,2,3),(-4,5,6)4,6,8)} b={(-7,-8,9) (12,6,5 )(8,7,4)}e c={(2,3-4)(6,7,1)(2,8,7 determine a matriz d resultante da operaçâo a+b -c

Answer 1

Para somar duas matrizes, basta somar os termos das mesmas posições. Assim:

$\left(\begin{array}{ccc}1&2&3\\-4&5&6\\4&6&8\end{array}\right) + \left(\begin{array}{ccc}-7&-8&9\\12&6&5\\8&7&4\end{array}\right)-\left(\begin{array}{ccc}2&3&-4\\6&7&1\\2&8&7\end{array}\right) =\\\\ \left(\begin{array}{ccc}1-7-2&2-8-3&3+9+4\\-4+12-6&5+6-7&6+5-1\\4+8-2&6+7-8&8+4-7\end{array}\right)= \left(\begin{array}{ccc}-8&-9&16\\2&4&10\\10&5&5\end{array}\right)$