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$\sum_{i= 1}^{4}t_{i}\,\sum_{i= 1}^{4}\frac{1}{t_{i}}= 16\,a^{2}$

inequality

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DOTOANNANG

DOTOANNANG

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  • ĐHV Toán Cao cấp
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Cho $t_{i}$ thoả $t_{i} \in \left ( 0,\,a \right ]\,\,\left ( a> 1 \right )$ và $\sum_{i= 1}^{4}t_{i}\,\sum_{i= 1}^{4}\frac{1}{t_{i}}= 16\,a^{2}$

 

$\min t_{i}= \,?$







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