Question 4

If / 1 2 3 3 1 2 4 1 2 A 5 0 2 , B 4 2 5 and C 0 3 2 1 1 1 2 0 3 1 2 3 − −           = = =           − −      , then compute (A+B) and (B - C). Also, verify that A + (B - C) = (A + B) - C.