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Question

Using properties of sets, show that (i)A(AB)=A(ii)A(AB)=A

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Solution

(i)A(AB)=AletBisasubsetofA(BA)AB=B[commonelementsofA&B]Now,A(AB)=AB=A[AllElementsbelongstoA&B](ii)A(AB)=AletAB(AisasubsetofA)AB=B[AllElementsbelongstoA&B]A(AB)=AB=A[commonelementsofA&B]
1030388_1024869_ans_5c424f5c93344dd9ba699353568de1cd.png

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