Question

03. Sendo A = ( 5 1 ) e B =
a) A.C
e C = (4), calcule:
b) B.C​

Answer 1

Resposta:

a)

 $\left[\begin{array}{ccc}11\\9\end{array}\right]$

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b)

 $\left[\begin{array}{ccc}-1\\2\end{array}\right]$

Explicação passo-a-passo:

a)

  $A.C = \left[\begin{array}{ccc}3&2\\5&1\end{array}\right].\left[\begin{array}{ccc}1\\4\end{array}\right]$ $= \left[\begin{array}{ccc}3+8\\5+4\end{array}\right] = \left[\begin{array}{ccc}11\\9\end{array}\right]$

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b)

  $B.C = \left[\begin{array}{ccc}3&-1\\2&0\end{array}\right].\left[\begin{array}{ccc}1\\4\end{array}\right]$ $= \left[\begin{array}{ccc}3-4\\2+0\end{array}\right] = \left[\begin{array}{ccc}-1\\2\end{array}\right]$