7个分数通扰伍坦分以后,分母有7个因数的和,等于分母48的因数:1,2,3,4,6,8,12,24,481+2+3+4+6+8+24=48这7个分数从小橘尺到大是:1/482/48=1/243/48=1/缓桐164/48=1/126/48=1/88/48=1/624/48=1/2
(1/局碰2)+(1/6)+(1/7)+(1/12)+(1/20)+(1/30)+(1/42)=[1-1/2]+[1/2-1/3]+1/7+[1/3-1/数腊者4]+[1/4-1/薯薯5]+[1/5-1/6]+[1/6-1/7]=1.