Question

Considere as matrizes A=(-1-2 23 0-4), B=(20 2-1 13)

Answer 1

Resposta:

$A+B= \left[\begin{array}{ccc}-1+2&2+2&0+1\\-2+0&3+(-1)&-4+3\\\end{array}\right] = \left[\begin{array}{ccc}1&4&1\\-2&2&-1\\\end{array}\right]$

e A+C não existe porque são de ordens diferentes