Question

50 Pontos. Questões sobre matrizes quem poder me ajudar com todas elas eu agradeço muito .

Answer 1

Olá

17)

$2A= \left[\begin{array}{ccc}3&2\\4&1\\\end{array}\right] \\ \\ \\ -3B= \left[\begin{array}{ccc}-6&9\\3&-18\\\end{array}\right] \\ \\ \\ C= \left[\begin{array}{ccc}3&4\\0&-1\\\end{array}\right] \\ \\ \\ 2A-3B+C=\left[\begin{array}{ccc}(3-6+3)~~~&(2+9+4\\(4+3+0)~~~&(1-18-1)\\\end{array}\right] \\ \\ \\ \boxed{\boxed{2A-3B+C=\left[\begin{array}{ccc}0~~~&15\\7~~~&-18\\\end{array}\right] }}$


18)

$-4A=\left[\begin{array}{ccc}-12&-8\\-16&-4\\\end{array}\right] \\ \\ \\ -2B=\left[\begin{array}{ccc}-4&6\\2&-12\\\end{array}\right] \\ \\ \\ -C=\left[\begin{array}{ccc}-3&-4\\0&-1\\\end{array}\right] \\ \\ \\ -4A-2B-C=\left[\begin{array}{ccc}(-12-4-3)~~~&(-8+6-4)\\(-16+2+0)~~~&(-4-12-1)\\\end{array}\right] \\ \\ \\ \boxed{\boxed{-4A-2B-C=\left[\begin{array}{ccc}-19&-6\\-14&-17\\\end{array}\right]}}$


19)

$AC= \left[\begin{array}{ccc}(24+0)~~~&(4-3)\\(18+0)~~~&(3-6)\\\end{array}\right] \\ \\ \\\boxed{\boxed{ AC= \left[\begin{array}{ccc}24&1\\18&-3\\\end{array}\right] }}$

20)

$AB= \left[\begin{array}{ccc}(12-2)&(-4+5)\\(9-4)&(-3+10)\\\end{array}\right] \\ \\ \\ \boxed{\boxed{AB= \left[\begin{array}{ccc}10&1\\5&7\\\end{array}\right] }}$


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