Question

Dadas as matrizes, calcule.

Answer 1

a) A + B

$\left[\begin{array}{cc}4&5&8\\\end{array}\right] + \left[\begin{array}{cc}2&3&5\\\end{array}\right] \\ \\ \left[\begin{array}{cc}4 + 2&5 + 3&8 + 5\\\end{array}\right] \\ \\ \left[\begin{array}{cc}6&8&13\\\end{array}\right]$

➖➖➖➖➖➖➖➖➖➖➖➖➖➖

b) A - B

$\left[\begin{array}{cc}4&5&8\\\end{array}\right] - \left[\begin{array}{cc}2&3&5\\\end{array}\right] \\ \\ \left[\begin{array}{cc}4 - 2&5 - 3&8 - 5\\\end{array}\right] \\ \\ \left[\begin{array}{cc}2&2&3\\\end{array}\right]$

➖➖➖➖➖➖➖➖➖➖➖➖➖➖

c) 5.A + 2.B

$5.\left[\begin{array}{cc}4&5&8\\\end{array}\right] \: + \: 2.\left[\begin{array}{cc}2&3&5\\\end{array}\right] \\ \\ \\ \left[\begin{array}{cc}5 \times 4&5 \times 5&5 \times 8\\\end{array}\right] + \left[\begin{array}{cc}2 \times 2&2 \times 3&2 \times 5\\\end{array}\right] \\ \\ \left[\begin{array}{cc}20&25&40\\\end{array}\right] + \left[\begin{array}{cc}4&6&10\\\end{array}\right] \\ \\ \left[\begin{array}{cc}20 + 4&25 + 6&40 + 10\\\end{array}\right] \\ \\ \left[\begin{array}{cc}24&31&50\\\end{array}\right]$