imo class 12 determinants

If A is a non-singular 2×2 matrix and |A| = 4, then |(adj A)⁻¹| is:

VAVidaara Admin Asked 6d ago 0 views 0 answers

If A is a non-singular 2×2 matrix and |A| = 4, then |(adj A)⁻¹| is:

  • A. 1/4
  • B. 4
  • C. 1/16
  • D. 16

Answer: A) 1/4

Explanation: |adj A| = 4¹ = 4. |(adj A)⁻¹| = 1/|adj A| = 1/4.

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