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	Các bình luận về: Đề bài: Cho $a,b,c $ dương và có $abc=1$. Chứng minh:$\frac{ab}{a^{5}+b^{5}+ab}+\frac{bc}{b^{5}+c^{5}+bc}+\frac{ca}{c^{5}+a^{5}+ca}\leq 1$	</title>
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