Answers

2015-06-25T18:48:34+05:30
A={1,2,3,4,5}; B={4,5,6,7}A - B={1,2,3}
B - A={6,7}
Clearly it is seen that:
(A-B) \neq (B-A).
1 5 1
2015-06-25T19:20:40+05:30
A - B means the numbers which are in A but not in B
B - A means the numbers which are in B but not in A 
So A=(1,2,3)
     B=(6,7) 
 Then A - B and B-A are not equal.

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