①1+1\2+1\6+1\12=1\20+1\30+1\42+1\56+1\72= ②1-1\2-1\4-1\8-1\16-1\32-1\64-1\128=

来源：学生作业学帮网编辑：学帮网时间：2024/07/04 22:26:11

1+1\2+1\6+1\12=1\20+1\30+1\42+1\56+1\72=17/9
1-1\2-1\4-1\8-1\16-1\32-1\64-1\128=1/128