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havu080903
2 năm trước
Cho $a,b,c \in \mathbb{R^+}$ thỏa mãn `a+b+c=2021`. Tìm GTLN của: $\\$ $\dfrac{a^4+b^4}{a^3+b^3} + \dfrac{b^4+c^4}{b^3+c^3}+\dfrac{c^4+a^4}{c^3+a^3}$
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