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haotiensinh


xet bo 3 so thuc duong a b c thoa man [TEX]21ab+2bc+12ca\le 12[/TEX]
tim gia tri nho nhat cua [TEX]P=\frac{1}{a}+\frac{2}{b}+\frac{3}{c}[/TEX]
minh chua biet danh ki tu toan hoc.cac ban tu dich ho
tim gia tri nho nhat cua [TEX]P=\frac{1}{a}+\frac{2}{b}+\frac{3}{c}[/TEX]
minh chua biet danh ki tu toan hoc.cac ban tu dich ho
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