Toán Lớp 10: Cho A = (2;4) và B = (1;3]. Tìm A ∪ B, A ∩ B, A\B, B\A, R\A, R\B, R\A ∩ B.
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Toán Lớp 10: Cho A = (2;4) và B = (1;3]. Tìm A ∪ B, A ∩ B, A\B, B\A, R\A, R\B, R\A ∩ B.
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