The matrix `[0 5-7-5 0 11 7-11 0]` is (a) a skew-symmetric matrix (b) a symmetric matrix (c) a diagonal matrix (d) an upper triangular matrix

If A is skew-symmetric matrix then A^(2) is a symmetric matrix.

If A is a square matrix, then A A is a (a) skew-symmetric matrix (b) symmetric matrix (c) diagonal matrix (d) none of these

The matrix A=[0-5 8 5 0 12-8-12 0] is a (a) diagonal matrix (b) symmetric matrix (c) skew-symmetric matrix (d) scalar matrix

A A' is always a symmetric matrix for any matrix A.

If A and B are symmetric matrices, then A B A is (a) symmetric matrix (b) skew-symmetric matrix (c) diagonal matrix (d) scalar matrix

The inverse of an invertible symmetric matrix is a symmetric matrix.

The matrix [(0,-5,8),(5,0,12),(-8,-12,0)] is a a) diagonal matrix b) symmetric matrix c) skew symmetric matrix d) scalar matrix

The matrix A=[(1, 0, 0),( 0, 2, 0),( 0, 0, 4)] is (a) identity matrix (b) symmetric matrix (c) skew-symmetric matrix (d) diagonal matrix

If A is a skew-symmetric matrix and n is odd positive integer, then A^n is a skew-symmetric matrix a symmetric matrix a diagonal matrix none of these

If A is symmetric as well as skew-symmetric matrix, then A is