(ii)  Show that the matrix 
0
1
1
A
1
0
1
1
1
0
−




= −




−


 is a skew symmetric matrix 8 For the matrix 
1
5
A
6
7


= 



, verify that
(i) (A + A′) is a symmetric matrix
(ii) (A – A′) is a skew symmetric matrix
9 Find 
(
)
1 A
A
2
′
+
 and 
(
)
1 A
A
2
′
−
, when 
0
A
0
0
a
b
a
c
b
c




= −




−
−


10