If A = [a b; c d] and |A| = 5, then |3A| is:
If A = [a b; c d] and |A| = 5, then |3A| is:
- A. 15
- B. 45
- C. 30
- D. 60
Answer: B) 45
Explanation: For 2×2 matrix, |kA| = k²|A| = 9 × 5 = 45.
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If A = [a b; c d] and |A| = 5, then |3A| is:
Answer: B) 45
Explanation: For 2×2 matrix, |kA| = k²|A| = 9 × 5 = 45.
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