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Gundoz2k
2 năm trước
Trên tia Ox lấy điểm a m sao cho oa = 3cm OB = 2 cm a) trong ba điểm o a b điểm nào nằm giữa hai điểm còn lại ? vì sao? b) Trên tia đối tia Ox lấy điểm B sao cho OB = 4 cm Tính BM
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