Question

Find the minor of $a_{22}$ of the matrix $\left[\begin{matrix}1&6&1\\\ 5&3&0\\\ 2&2&9\end{matrix}\right]\cdot$

• A. $5$
• B. $6$
• C. $7$
• D. $8$

Answer 1

Answer: (C)

$7$

Answer 2

$M_{22}=\left|\begin{matrix}1&1\\\ 2&9\end{matrix}\right|=9-2=7$