Question

The value of the determinant $\left|\begin{array}{ccc}1& 3& 2\\ 4& 1& 1\\ 2& 1& 3\end{array}\right|$ is

• A. -28
• B. -24
• C. -32
• D. 36

Answer 1

The correct option is B -24

$\left|A\right|$ = $\left|\begin{array}{ccc}1& 3& 2\\ 4& 1& 1\\ 2& 1& 3\end{array}\right|$

= 1(3-1)-3(12-2)+2(4-2) = -24