Answer: A = -AT.
- A A = AT
- B A = -AT
- C det(A) = 1
- D A = 2AT
Correct answer: B. A = -AT
Explanation: A is skew-symmetric if A = -AT, meaning aij = -aji. All diagonal elements of a skew-symmetric matrix are zero.
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