Question

Socorro, exercícios de matrizes

Answer 1

Resposta:

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

a) A + B

$\left[\begin{array}{ccc}8+1&2+5&1+8\\3+4&4+3&5+5\\\end{array}\right] =\left[\begin{array}{ccc}9&7&9\\7&7&10\\\end{array}\right]$

b) A + C

$\left[\begin{array}{ccc}8+(-1)&2+(-2)&1+(-3)\\3+8&4+(-4)&5+(-5)\\\end{array}\right] =\left[\begin{array}{ccc}7&0&-2\\11&0&0\\\end{array}\right]$

c) B + C

$\left[\begin{array}{ccc}1+(-1)&5+(-2)&8+(-3)\\4+8&3+(-4)&5+(-5)\\\end{array}\right] =\left[\begin{array}{ccc}0&3&5\\12&-1&0\\\end{array}\right]$

d) A + B + C

$\left[\begin{array}{ccc}8+1+(-1)&2+5+(-2)&1+8+(-3)\\3+4+8&4+3+(-4)&5+5+(-5)\\\end{array}\right] =\left[\begin{array}{ccc}8&5&6\\15&3&5\\\end{array}\right]$