The determinant of the matrix [1 2 3; 4 5 6; 7 8 9] is:
The determinant of the matrix [1 2 3; 4 5 6; 7 8 9] is:
- A. 0
- B. 1
- C. −1
- D. 2
Answer: A) 0
Explanation: Row operations: R3−R2 = [3 3 3] and R2−R1 = [3 3 3]. Since R2 and R3 are proportional, determinant is 0.
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