求|1/10-1/11|+|1/11-1/12|+…+|1/49-1/50|
问题描述:
求|1/10-1/11|+|1/11-1/12|+…+|1/49-1/50|
RT
答
|1/10-1/11|+|1/11-1/12|+…+|1/49-1/50|
=1/10-1/50
=2/25