In a skew-symmetrix matrix, the diagonal elements are all

Define a skew-symmetric matrix.

In a skew-symmetric matrix, every principal diagonal element is

If A is the n xx n matrix whose elements are all '1' and B is the n xx n matrix whose diagonal elements are all 'n' and other elements are n-r , then A^(2) is a scalar multiple of

If A is the n xx n matrix whose elements are all '1' and B is the n xx n matrix whose diagonal elements are all 'n' and other elements are n-r , then A^(2) is a scalar multiple of

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

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

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

The inverse of a skew symmetric matrix of odd order is 1)a symmetric matrix 2)a skew symmetric matrix 3)a diagonal matrix 4)does not exist