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banglangtim_dhtn_2005
2 năm trước
Bài 1: Cho hpt với tham số m mx-y=2m x-my=1+m a) Tìm m để hpt có nghiệm duy nhất b) Tìm m để hpt có nghiệm nguyên Bài 2 Cho tam giác ABC đều nội tiếp trong đường tròn (O,R) a) Tính cạnh của tam giác ABC và DIỆN TÍCH ABC theo R b) Điểm M chạy trên cung nhỏ BC (M khác B, M khác C ) .Dây AM cắt day BC tại D . CMR AM=BM+CM
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