1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=梯式计算

来源：学生作业帮助网编辑：作业帮时间：2024/11/09 00:46:28

1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=梯式计算
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=梯式计算

1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=梯式计算
1/1*2+1/2*3+…+1/8*9=1-1/2+1/2-1/3…+1/8-1/9=1-1/9=8/9