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anhabo2k4
2 năm trước
Chox > 1, y > 2và x + y = 7. Tìm giá trị nhỏ nhất của biểu thức: A= 2x + $\frac{7}{2}$ *y + $\frac{3}{x-1}$ + $\frac{9}{y-2}$
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