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nguyenduong
2 năm trước
Trong mặt phẳng với hệ trục tọa độ Oxy cho tứ giác ABCD nội tiếp đg tròn bán kính BD . Gọi M,N lần lượt là các hình chiếu vuông góc của A trên các đg thg BC, BD và P là giao điểm của 2 đg thg MN, AC . Bt đg thg AC có pt : -x+y+1=0 , M(0;4),N(2;2) và hoành độ điểm A nhỏ hơn 2. Tìm tọa độ các điểm P,A,B
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