Question

Ramu aid,'if A -B = A, then A and B are disjoint sets'. do you accpet with him ? justify your answer.

Answer 1

Let us assume A-B=C C contains elements of A and not B But given A-B=A(difference) Here the difference A contains elements of A only and not of B As A-B= A A and B are. Disjoint sets Eg:A={1,2,3},B=}4,5,6} A-B={1,2,3}=A