Evaluate.
-$$\left| \begin{array} { l l l }
1 & 2 & 3 \
2 & 1 & 4 \
1 & 2 & 3
\end{array} \right|$$
A) $- 16$
B) 1
C) 0
D) 46

Name: Evaluate. -\[\left| \begin{array} { l l l } 1 & 2 & 3 \\ 2 & 1 & 4 \\ 1 & 2 & 3 \end{array} \right|\] A) $- 16$ B) 1 C) 0 D) 46
Brand: Quizplus
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Question

Evaluate.
-$$\left| \begin{array} { l l l } 
1 & 2 & 3 \
2 & 1 & 4 \
1 & 2 & 3
\end{array} \right|$$
A) $- 16$
B) 1
C) 0
D) 46

Quizplus · Accepted Answer

The determinant of a matrix with two identical rows is always 0. In this matrix, the first and third rows are identical, making the determinant 0.

Evaluate - ∣123214123∣\left| \begin{array} { l l l } 1 & 2 & 3 \\2 & 1 & 4 \\1 & 2 & 3\end{array} \right|​121​212​343​​

Evaluate
- $\left| \begin{array} { l l l } 1 & 2 & 3 \\2 & 1 & 4 \\1 & 2 & 3\end{array} \right|$