1/2+1/6+1/12+1/20+1/30/1+1/42+1/56+1/72+1/90
问题描述:
1/2+1/6+1/12+1/20+1/30/1+1/42+1/56+1/72+1/90
答
3/4不好意思,我乱答的我,草尼玛
1/2+1/6+1/12+1/20+1/30/1+1/42+1/56+1/72+1/90
3/4不好意思,我乱答的我,草尼玛