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Consider a square matrix A of order 2 which has its elements as 0,1 , 2,4 . If the absolute value of A is least then, the absolute value of a d j a d j A is equal to

Options

  1. A0
  2. B2
  3. C1
  4. D4

Correct answer

B. 2

Step-by-step solution

For absolute least value of A A = 0 2 1 4   or   2 4 0 1 ⇒ A = ± 2 a d j a d j A = A ( 2 - 1 ) 2 = A = ± 2 So, absolute value is equal to 2

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