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If A is a square matrix of order 3 with | A | 0 , then which one of the following is correct?

Options

  1. A| adj A |=| A |
  2. B| adj A |=| A |^2
  3. C| adj A |=| A |^3
  4. D| adj A|^2=| A |

Correct answer

B. | adj A |=| A |^2

Step-by-step solution

As | A | 0 , It is non-singular matrix. Hence, | Adj A |=| A |^2

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