Answer: ±1.
- A 0
- B 1
- C ±1
- D 3
Correct answer: C. ±1
Explanation: AAᵀ = I gives det(A)² = 1, so det(A) = ±1.
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