0.142857,0.285714,0.428571,0.571428的规律是什么,每个数两头分别循环

1/7=0。142857循环2/7=0。285714循环3/7=0。428571循环4/7=0。571428循环5/7=0。714285循环6/7=0。857142循环7/7=0。999999循环=18/7=1。142857循环9/7=1。285714循环10/7=1。428571循环11/7=0。571428循环12/7=0。714285循环13/7=0。857142循环14/7=1。999999循环=2……依此类推,(7n+1)/7=n。142857循环(7n+2)/7=n。285714循环(7n+3)/7=n。428571循环(7n+4)/7=n。571428循环(7n+5)/7=n。714285循环(7n+6)/7=n。857142循环(7n+7)/7=n。999999循环=(n+1)其中n为非负整数