问题
解答题
已知
|
答案
由
+(ab-2)2=0,可求出a=1,b=2,代入得:a-1
+1 1×2
+1 2×3
+…+1 3×4 1 2005×2006
=1-
+1 2
-1 2
+1 3
-1 3
+…+1 4
-1 2005 1 2006
=1-1 2006
=
.2005 2006
已知
|
由
+(ab-2)2=0,可求出a=1,b=2,代入得:a-1
+1 1×2
+1 2×3
+…+1 3×4 1 2005×2006
=1-
+1 2
-1 2
+1 3
-1 3
+…+1 4
-1 2005 1 2006
=1-1 2006
=
.2005 2006