Question

Ps:. a resposta está de azul... Preciso do calculo​

Answer 1

Resposta:

(1/2)B =

5

2

-4

X=

a

b

c

2a-3+5=0   ==>a=-1

2b-2+2=0 ==>b=0

2c-(-1)-4=0 ==>c=3/2

Answer 2

Resposta:

Explicação passo-a-passo:

$2X-A+\dfrac{1}{2}B=0\\\\\\2X-\left[\begin{array}{c}3\\2\\-1\end{array}\right]+\dfrac{1}{2} \left[\begin{array}{c}10\\4\\-8\end{array}\right]=0\\\\2X-\left[\begin{array}{c}3\\2\\-1\end{array}\right]+\left[\begin{array}{c}5\\2\\-4\end{array}\right]=0\\\\\\\\2X=\left[\begin{array}{c}3\\2\\-1\end{array}\right]-\left[\begin{array}{c}5\\2\\-4\end{array}\right]\\\\\\2X=\left[\begin{array}{c}-2\\0\\3\end{array}\right]\\\\\\\\X=\dfrac{1}{2} \left[\begin{array}{c}-2\\0\\3\end{array}\right]$

$X=\left[\begin{array}{c}-1\\0\\\frac{3}{2} \end{array}\right]$