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1,1/2,3/13,1/10,5/121 数字推理
人气:414 ℃ 时间:2019-11-14 21:59:38
解答
规律如下:
1 = 1/1
1/2 = 2/4 = 2/(1+3)
3/13 = 3/13 = 3/(1+3+9)
1/10 = 4/40 = 4/(1+3+9+27)
5/121 = 5/121 = 5/(1+3+9+27+81)
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