Find the determinant of the matrix with rows (8, 3) and (4, 2).
Answer and explanation
Correct answer: A. 4
- Step 1: For rows (a, b) and (c, d) the determinant is ad - bc.
- Step 2: det = 8 x 2 - 3 x 4 = 4.
Answer
4.
Why not the others: '28' adds the cross products instead of subtracting; '16' multiplies along rows instead of diagonals; '3' adds the entries.
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