, ` 3400 and ` 7200, respectively EXERCISE 3 2
1 Let 
2
4
1
3
2
5
A
, B
, C
3
2
2
5
3
4
−






=
=
=






−






Find each of the following:
(i) A + B
(ii) A – B
(iii) 3A – C
(iv) AB
(v) BA
2