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2 địa điểm cách nhau 180km có 2 xe khởi hành cùng 1 lúc, chạy ngược chiều nhau . xe từ Aco1 vận tốc v1=36km/h, xe từ B có vận tốc v2=54km/h. chọn địa điểm A làm gốc tọa độ, chọn gốc thời gian lúc xe khởi hành, chiều từ A đến B là chiều dương. thời điểm 2 xe tới gặp nhau và tọa độ của địa điểm 2 xe gặp nhau là bao nhiêu
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2 địa điểm cách nhau 180km có 2 xe khởi hành cùng 1 lúc, chạy ngược chiều nhau . xe từ Aco1 vận tốc...
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