Answer: 2×2.
- A 2×2
- B 3×3
- C 2×3
- D 3×2
Correct answer: A. 2×2
Explanation: The product takes the rows of the first and columns of the second: 2×2.
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