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hoamaudon08cd
2 năm trước
Giúp mik với:: 2 xe máy của Nam và An cùng chuyển động trên một đường thẳng với vận tốc Vnam = 45km/h, Van = 65km/h , xác định vận tốc tương đối của nam so với an trong 2 trường hợp: - 2 xe chiền động cùng chiều - 2 xe chuyển động ngược chiều
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