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dapgianchettuoi
2 năm trước
Cho tam giác ABC có phương trình đường cao kể từ B: x+2y-1=0 , đường trung tuyến kẻ từ A : x-y+1=0 và điểm M(1;1). Tìm toạ độ 3 đỉnh của tam giác ABC
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