If |A| = 2, where A is 2 × 2 matrix, find |adj A|. - Vidyadip

Question

If |A| = 2, where A is 2 × 2 matrix, find |adj A|.

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Answer

For any square matrix A of order n, |adj A| = |A|^n-1
Given, |A| = 2
Here, order is 2
⇒ |adj A| = |2|²^-1 = 2

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