Question

considere as matrizes A=[1 2 4][3 4 9] e B[ -5 5 -8][0 2 -6] determime. a) A+B b)(-A)+(-B) C)-5A+2B

Answer 1

a) $\left[\begin{array}{ccc}-4&7&-4\\3&6&3\\\end{array}\right]$
b)$\left[\begin{array}{ccc}4&-7&4\\-3&-6&-3\\\end{array}\right]$
c)$\left[\begin{array}{ccc}-15&0&-36\\-15&-16&-57\\\end{array}\right]$