Question

find value of 9th question with full explanation

Answer 1

Answer:

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Answer 2

Let

$A= \begin{bmatrix}6 & 0 & - 1 \\2 & 1 & 4 \\1 & 1 & 3\end{bmatrix}$

So,

$|A| = 6(3 - 4) - 0(6 - 4) - 1(2 - 1)$

$|A| = 6( - 1) - 0(2) - 1(1)$

$= > |A| = - 6 - 0 - 1$

$= > |A| = - 7$