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数学
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1 3/4 2/3 5/8 5/3...
从左往右第100个数十多少?
人气:406 ℃ 时间:2020-01-26 05:12:53
解答
1 3/4 2/3 5/8 5/3
2/2,3/4,4/6,5/8,6/10.(n+1)/2n
a100=(100+1)/2*100=101/200
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