Cho a,b,c dương và $abc\leqslant 1$. Tìm max: $\sum \sqrt[3]{\frac{a^2+a}{a^2+a+1}}$
Edited by alexander123, 16-12-2021 - 08:24.
Tìm max: $\sum \sqrt[3]{\frac{a^2+a}{a^2+a+1}}$
Started By alexander123, 16-12-2021 - 08:24
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