Answer: equal to 1/3.
- A equal to 1/3
- B equal to 3
- C equal to 9
- D equal to 1
Correct answer: A. equal to 1/3
Explanation: |A⁻¹| = 1/|A| = 1/3.
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