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Q7 of 45 Page 1

A is a square matrix of order 3 and |A| = 7. Write the value of| adj. A|.

Given, |A| = 7

We know, if A is an order of n then |adj A| = |A|^{n - 1}

Here, A is a square matrix of order 3

So, |adj A| = |A|²

|adj A| = 7²

|adj A| = 49

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