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	Các bình luận về: Đề bài: Cho $n \in Z,n \geq 2$.Chứng minh rằng:$C^{0}_{n}.C^{1}_{n}&#8230;C^{n}_{n} \leq (\frac{2^{n}-2}{n-1})^{n-1}$	</title>
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