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Bài 11: Cho 3 tập hợp : A = {1, 2, 3, 4} ; B = {2, 4, 6} ; C = {4, 6} a/ Tìm AnB, AnC, BnC b/ Tìm A U B , A U C ,B U C c/ Tìm A \B, A\C,C\B d/ Tìm An (B U C) và (An B) U (An C). Có nhận xét gì về hai tập hợp này ?
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