If , find y
2
3
1
-1
If C is skew symmetric matrix of order n and X is n x 1 column matrix, then XlCX is a
Scalar matrix
Unit matrix
Null matrix
None of these
then AB=
A
B
0
If then the values of x and y are _________ ?
2, -2
-2, 2
2, 2
1, 1
Which one of the following is wrong ?
The elements on the main diagonal of a symmetric matrix are all zero.
The elements on the main diagonal of a skew-symmetric matrix are all zero.
For any square matrix A, 1/2 (A + Al) is symmetric.
For any square matrix 1/2 (A - Al) is skew symmetric.
A2 = A
B2= B
AB ≠ BA
AB = BA
then A is
Symmetric
Skew symmetric
Non- singular
Singular