Q. 50
If A is a square matrix then (A-A’) is
A. A null matrix
B. An identity matrix
C. A symmetric matrix
D. A skew-symmetric matrix
Answer :
Let X = A-A’
X’ = (A-A’)’
= A’ - (A’)’
=A’ – A
= -(A – A’)
= -X
Therefore (A-A’) is skew symmetric matrix.
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