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If A = {3, 6, 9, 12, 15, 18, 21}, B = {4, 8, 12, 16, 20},C = {2, 4, 6, 8, 10, 12, 14, 16}, D = {5, 10, 15, 20}; find(i) A – B(ii) A – C(iii) A – D(iv) B – A(v) C – A(vi) D – A(vii) B – C(viii) B – D(ix) C – B(x) D – B(xi) C – D(xii) D – C

Answer» (i) A – B = {3, 6, 9, 15, 18, 21}
(ii) A – C = {3, 9, 15, 18, 21}
(iii) A – D = {3, 6, 9, 12, 18, 21}
(iv) B – A = {4, 8, 16, 20}
(v) C – A = {2, 4, 8, 10, 14, 16}
(vi) D – A = {5, 10, 20}
(vii) B – C = {20}
(viii) B – D = {4, 8, 12, 16}
(ix) C – B = {2, 6, 10, 14}
(x) D – B = {5, 10, 15}
(xi) C – D = {2, 4, 6, 8, 12, 14, 16}
(xii) D – C = {5, 15, 20}


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