Question

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

• A. $5$
• B. $6$
• C. $7$
• D. $8$

Answer 1

Answer: (C)

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