If A= [ ccc 2 & -1 & 3 4 & 2 & 5 0 & 4 & -1 ], then co-factor A_ … - Vidyadip

MCQ

If $A=\left[\begin{array}{ccc}2 & -1 & 3 \\ 4 & 2 & 5 \\ 0 & 4 & -1\end{array}\right]$, then co-factor $A_{32}$ is

A
$-2$
B
$-8$
C
4
✓
2

✓

Answer

Correct option: D.

2

(D) $A_{32}=(-1)^{3+2} \cdot M_{32}=(-1)^5\left|\begin{array}{ll}2 & 3 \\ 4 & 5\end{array}\right|=2$

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