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tranghvcs94
2 năm trước
Cho hình bình hành ABCD có tâm O,M và N là trung điểm của AD và BC .Xác định các vectơ cùng phương ,cùng hước ,, ngước hướng với vetơ AB . Giups mình nha các bạn ,3h chiều nay nay mình phải nộp rồi .Helppppppp meeeee
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