Answer: not commutative.
- A not commutative
- B fully commutative
- C always undefined
- D always exactly zero
Correct answer: A. not commutative
Explanation: For matrices AB ≠ BA in general, so multiplication is not commutative.
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