Question

só falta essas 3 pra mim

Answer 1

Matriz a:

$\left[\begin{array}{ccc}10&0&0\\0&10&0\\0&0&10\end{array}\right]$

Matriz B:

$\left[\begin{array}{ccc}3&0&0\\0&3&0\\0&0&3\end{array}\right]$

A.B:

$\left[\begin{array}{ccc}10*3&0&0\\0&10*3&0\\0&0&10*3\end{array}\right] =\left[\begin{array}{ccc}30&0&0\\0&30&0\\0&0&30\end{array}\right]$

det(AB) = 30 x 30 x 30 = 27000 = 27 * 10³ (Letra A)