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Binh nhất
cho a,b,c>0 thỏa $a^{3}+b^{3}+c^{3}=3$. chứng minh
$a^{m}+b^{m}+c^{m}\geq a^{n}+b^{n}+c^{n}(m,n\in N, m\geq n\geq 3)$
ai giải giúp mình với
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