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