问题
填空题
|
答案
+1 1×2
+…+1 2×3 1 2010×2011
=1-
+1 2
-1 2
+…+1 3
-1 2010 1 2011
=1-1 2011
=
.2010 2011
故答案为:
.2010 2011
|
+1 1×2
+…+1 2×3 1 2010×2011
=1-
+1 2
-1 2
+…+1 3
-1 2010 1 2011
=1-1 2011
=
.2010 2011
故答案为:
.2010 2011