Answer: A = AT.
- A A = AT
- B A = -AT
- C AT = 0
- D det(A) = 0
Correct answer: A. A = AT
Explanation: A matrix A is symmetric if A = AT, meaning element aij = aji for all i, j.
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