找规律.2,3,5,8,12,_ 2/1,6/5,12/11,20/19,_,42/41

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找规律.2,3,5,8,12,_2/1,6/5,12/11,20/19,_,42/41找规律.2,3,5,8,12,_2/1,6/5,12/11,20/19,_,42/41找规律.2,3,5,8,12

找规律.2,3,5,8,12,_ 2/1,6/5,12/11,20/19,_,42/41
找规律.2,3,5,8,12,_ 2/1,6/5,12/11,20/19,_,42/41

找规律.2,3,5,8,12,_ 2/1,6/5,12/11,20/19,_,42/41
17,30/29
第一个+1+2+3这样加上去,第二个分子+4+6+8这样加.