Find the minor of element 6 in the determinant of matrix [1 2 3; 4 5 6; 7 8 9].
Find the minor of element 6 in the determinant of matrix [1 2 3; 4 5 6; 7 8 9].
- A. 6
- B. -6
- C. 12
- D. -12
Answer: B) -6
Explanation: Element 6 is a₂₃. Deleting row 2 and col 3 leaves |1 2; 7 8|. Minor M₂₃ = 8 - 14 = -6.
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