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Mathematics, 22.06.2021 17:40, annadson7807
Trong mặt phẳng tọa độ Oxy , cho các đường thẳng − + = 1 : 5 12 5 0 x y , − − = 2 : 5 12 8 0 x y , − − = 3 : 5 12 21 0 x y . Một đường thẳng d thay đổi cắt ba đường thẳng 1 2 3 , , lần lượt tại A B C , , . Giá trị nhỏ nhất của biểu thức 4 1 M AB BC = + + bằng
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Trong mặt phẳng tọa độ Oxy , cho các đường thẳng − + = 1 : 5 12 5 0 x y , − − = 2 : 5 12 8 0 x y...
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