Cho $a,b,c>0, a+b+c=3$ CMR: $(a^3+b^3+c^3)(ab+bc+ca)^8\leq 3^9$
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Cho $a,b,c>0, a+b+c=3$ CMR: $(a^3+b^3+c^3)(ab+bc+ca)^8\leq 3^9$
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