Calcule os determinantes, aplicando a regre de Sarrus a) $\...

Calcule os determinantes, aplicando a regre de Sarrus

a) $\begin{bmatrix}2&3&1\\4&-2&1\\2&1&2\end{bmatrix}$

$\begin{array}{c}+\\+\\+\end{array}$ 4+6+4-2-12-4

14-12=-4

$\begin{array}{c}+4\\-2\\-12\end{array}$

b) $\begin{bmatrix}1&2&3\\3&2&1\\0&4&3\end{bmatrix}$

$Calcule os determinantes, aplicando a regre de Sarrus a) $\begin{bmatrix}2&3&1\\4&-2&1\\2&1&2\end{bmatrix}$ $\begin{array}{c}+\\+\\+\end{array}$4+6+4-2-12-4 14-12=-4 $\begin{array}{c}+4\\-2\\-12\end{array}$ b) $\begin{bmatrix}1&2&3\\3&2&1\\0&4&3\end{bmatrix}$$

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