1/2,1/3,2/5,5/8,5/13,(),() 找规律填空
人气:430 ℃ 时间:2019-12-09 10:10:53
解答
1/2 1/3 2/5 3/8 5/13 (8/21) (13/34 ) (21/55 )
后一个的分子为前两个分子的和,后一个的分母为前两个分母的和.
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