Tìm: A

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mso-ansi-language:VI'>∩D<!--[endif]--><!--[if gte vml 1]-->
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<!--[endif]-->----- Nội dung dịch tự động từ ảnh -----
Cho A=(1;7], B=(-∞0; 5], C=(4; 9), D = {1; 4; 5}. Tim : An D; BnD; C n D; (ANC) ND; (BND) nC, (CNB) ND