Answer: [[2, −3], [−1, 2]].
- A [[2, −3], [−1, 2]]
- B [[2, 3], [1, 2]]
- C [[−2, 3], [1, −2]]
- D [[2, −1], [−3, 2]]
Correct answer: A. [[2, −3], [−1, 2]]
Explanation: Determinant = 1, so inverse = adjugate = [[2, −3], [−1, 2]].
Element aij of matrix A sits at the intersection of row i and column j.
Concept context
Matrix operations, determinants, inverses, and solving linear systems