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Does A-B=B-A always correct?(a) True(b) FalseThis question was addressed to me in my homework.The query is from Operation on Sets-2 in division Sets of Mathematics – Class 11

Answer»

The CORRECT option is (b) False

To EXPLAIN: If A={1,2,3} and B={3,4,5}, then A-B={1,2,3} – {3,4,5} = {1,2} and B-A={3,4,5} – {1,2,3} = {4,5}. They are not equal so,

A-B and B-A are not always equal.



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