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