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$$\left ( x+ 2\,y \right )\left ( y+ 3\,z \right )\left ( z+ 4\,x \right )\geqq 60\,xyz$$

inspired from rmm inequality

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DOTOANNANG

DOTOANNANG

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  • ĐHV Toán Cao cấp
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Cho $x,\,y,\,z$ dương thỏa $\frac{8}{x^{2}}\leqq \frac{5}{y^{2}}+ \frac{3}{z^{2}}$. Chứng minh:

$$\left ( x+ 2\,y \right )\left ( y+ 3\,z \right )\left ( z+ 4\,x \right )\geqq 60\,xyz$$







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