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Question

Let A be a non singular square matrix of order 3×3. Then |adj A| 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 |adj A|=|A|n1
Where n is the order of matrix A
Here, n=3
|adj A|=|A|31
|adj A|=|A|2
Hence, B is the correct answer.

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