If A is a 3×3 matrix and |A| = 4, then |adj A| is equal to:
If A is a 3×3 matrix and |A| = 4, then |adj A| is equal to:
- A. 16
- B. 4
- C. 64
- D. 256
Answer: A) 16
Explanation: For an n×n matrix, |adj A| = |A|^(n−1). Here n = 3, so |adj A| = |A|² = 4² = 16.
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