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khavu250786
2 năm trước
Giúp e bài này nha HSG, CHuyên gia Cho m,n thuộc Z+ thỏa mãn $\sqrt{23}$ -$\frac{m}{n}$ >0 CMR $\sqrt{23}-\frac{m}{n} > \frac{4(\sqrt{23-4)}}{mn}$
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