先观察这个式子,可知分子比分母都多一,所以把一全部提出来得5+1/2+1/6+1/12+1/20+1/30又1/2+1/6+1/12+1/20+1/30=1/2+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)=5/6所以结果为35/6