问题
解答题
已知a,b是有理数,且(a-1)2+|b-2|=0.求
|
答案
∵(a-1)2+|b-2|=0,
∴a=1,b=2,
∴
+1 ab
+1 (a+1)(b+1)
+…+1 (a+2)(b+2)
,1 (a+2006)(b+2006)
=
+1 2
+1 2×3
+…+1 3×4
,1 2007×2008
=
+1 2
-1 2
+1 3
-1 3
+…+1 4
-1 2007
,1 2008
=1-
,1 2008
=
.2007 2008