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