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Hai oto xuat phat cung 1 luc tu hai noi A và B cách nhau 20km trêm đường thẳng qua a và b xe xuất phát từ a chuyển động đến b với vận tốc 40 km xe xuất phát từ b chuyển động đến a với vận tốc 60 km trên giờ chọn gốc tọa độ A . Chiều đường từ A đến b gốc thời gian là lúc bắt đầu xuất
a, viết công thức tính quãng đường đi được của hai xe tính quãng đường hai xe đi được sau 2 giờ
B, luật ptcd của hai xe vẽ đồ thị tọa độ thời gian của 2 xe
C vị trí và thời điểm hai xe gặp nhau
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Hai oto xuat phat cung 1 luc tu hai noi A và B cách nhau 20km trêm đường thẳng qua a và b xe xuất ph...
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