Let A be a non singular square matrix of order 3×3. Then |adjA| is equal to
A
3|A|
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B
|A|
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C
|A|2
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D
|A|3
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Solution
The correct option is C|A|2 We know that |adjA|=|A|n−1
Where n is the order of matrix A
Here, n=3 |adjA|=|A|3−1 ⇒|adjA|=|A|2
Hence, B is the correct answer.