If 
and I is the identity matrix of order 2, show that 
We know that I 
Now, LHS = I + A 
And on RHS = (I – A)
= LHS
Hence Proved.
23
If and I is the identity matrix of order 2, show that
We know that I
Now, LHS = I + A
And on RHS = (I – A)
= LHS
Hence Proved.