Question

Os valores de x e y na seguinte equação matricial são respectivamente :


a) 8 e 1

b) 8 e 2

c) 1 e 8

d) 2 e 8

e) -2 e -6

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Answer 1

Explicação passo-a-passo:

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$\left(\begin{array}{ccc}2&x\\y&3\\\end{array}\right)+\left(\begin{array}{ccc}-4&-4\\-7&5\\\end{array}\right)=2.\left(\begin{array}{ccc}-1&2\\-3&4\\\end{array}\right)\\\\\\\left(\begin{array}{ccc}2+(-4)&x+(-4)\\y+(-7)&3+5\\\end{array}\right)=\left(\begin{array}{ccc}2.(-1)&2.2\\2.(-3)&2.4\\\end{array}\right)\\\\\\\left(\begin{array}{ccc}-2&x-4\\y-7&8\\\end{array}\right)=\left(\begin{array}{ccc}-2&4\\-6&8\\\end{array}\right)\\\\\\x-4=4\\\\x=4+4\\\\\boxed{\boxed{x=8}}\\\\y-7=-6\\\\y=-6+7$

$\boxed{\boxed{y=1}}$

Resposta C