1-2/3-1/6-1/12-1/24-1/48-...-1/768=?
问题描述:
1-2/3-1/6-1/12-1/24-1/48-...-1/768=?
答
1-2/3=1/3=2/6
2/6-1/6=1/6=2/12
.
2/768-1/768=1/768