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kride_dragon


Cho ba số dương a,b,c.......
Chứng minh rằng:
$\dfrac{a^5}{b^2} + \dfrac{b^5}{c^2} +\dfrac{c^5}{a^2} \ge a^3 + b^3 + c^3$
Chứng minh rằng:
$\dfrac{a^5}{b^2} + \dfrac{b^5}{c^2} +\dfrac{c^5}{a^2} \ge a^3 + b^3 + c^3$
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