CBSE Class 12 Math 2022 Term I Solved Paper

Question : 30

Total: 50

If A is a square matrix of order 3 and |A|=−5, then |adj‌A| is

Solution: 👈: Video Solution

Explanation: We know that,
|adj‌A|=|A|n−1
where n is the order of the matrix
∴‌‌|adj‌A|
‌=(5)3−1
‌=52=25

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