Answer: A.
- A 0
- B I
- C A
- D -A
Correct answer: C. A
Explanation: Transposing twice returns the original matrix: (A<sup>T</sup>)<sup>T</sup> = A. Transpose is its own inverse.
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