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Determinants
Question
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Let A be a non-singular square matrix of order 3 × 3. Then | adj A| j is equal to
  • | A |
  • | A |2
  • | A |3
  • 3 | A |

Answer

B.

| A |2

We know that
I adj A | = | A |n_l where A is of order n
Now A is non-singular matrix of order 3 × 3
∴   | adj A | = | A |2
∴   (B) is correct answer.

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