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Question

If A is a non-singular square matrix of order 3×3, find |adjA|

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Solution

We know that |adj(A)|=|A|n1
where n is the order of matrix A
Here n=3, |adj(A)|=|A|31=|A|2.

1257551_1332701_ans_c1ded3ef1b6a4cadaa227acce94e6b50.PNG

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