Ⅰ1/10-1/11Ⅰ+Ⅰ1/11-1/12Ⅰ+ .+Ⅰ1/49-1/50ⅠDDDDDDDDDDD
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/24 18:42:43
Ⅰ1/10-1/11Ⅰ+Ⅰ1/11-1/12Ⅰ+.+Ⅰ1/49-1/50ⅠDDDDDDDDDDDⅠ1/10-1/11Ⅰ+Ⅰ1/11-1/12Ⅰ+.+Ⅰ1/49-1/50ⅠDDDDDDDDDDDⅠ1/1
Ⅰ1/10-1/11Ⅰ+Ⅰ1/11-1/12Ⅰ+ .+Ⅰ1/49-1/50ⅠDDDDDDDDDDD
Ⅰ1/10-1/11Ⅰ+Ⅰ1/11-1/12Ⅰ+ .+Ⅰ1/49-1/50Ⅰ
DDDDDDDDDDD
Ⅰ1/10-1/11Ⅰ+Ⅰ1/11-1/12Ⅰ+ .+Ⅰ1/49-1/50ⅠDDDDDDDDDDD
最后等于 1/10-1/50 =4/50=2/25
看不懂