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trungboc2002
2 năm trước
Cho tam giác 𝑨𝑩𝑪. Gọi 𝑰, 𝑱 lần lượt là các điểm cho bởi 𝑰𝑨=𝟐𝑰𝑩,𝟑𝑱𝑨+𝟐𝑱𝑪=𝟎. Cho 𝒌≠𝟎 và điểm 𝑬 thỏa mãn 𝑬𝑩=𝒌𝑬𝑪. Tìm 𝒌 để 𝑰,𝑱,𝑬 thẳng hàng
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