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luyenhoang1303
2 năm trước
câu 1: Cho lục giác đều ABCDEF, tâm O có bao nhiêu vecto (khác vecto 0 ) cùng phương vs vecto EF ? A.7 B.8 C.9 D.10 Câu 2. Cho lục giác đều ABCDEF, tâm O có bao nhiêu vecto bằng vs vecto EF? A.1 B.2 C.3 D.4
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