Q50 of 98 Page 314

If A is a square matrix then (A-A^’) is

Let X = A-A’

X’ = (A-A’)’

= A’ - (A’)’

=A’ – A

= -(A – A’)

= -X

Therefore (A-A’) is skew symmetric matrix.

If A=then A^-1=?

If A is a square matrix then (A + A^’) is

If A is a 3-rowed square matrix and │3A│=k │A│ then k =?

Which one of the following is a scalar matrix?

If A is a square matrix then (A-A’) is