2,4/3,6/7,8/13,10/21,...,则第n个数为多少?（用含有n的代数式表示）
2,4/3,6/7,8/13,10/21,...,则第n个数为多少?（用含有n的代数式表示）
如题
如题
数学人气：319 ℃时间：2019-09-17 09:34:57
优质解答
2n/[n(n-1)+1]
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