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已知|ab-2|+|a-1|=0,则:a=,b=.在此条件下,计算:1ab+1(a+1)(b+1)+1(a+2)(b+2)+…+1(a+2已知|ab-2|+|a-1|=0,则:a=,b=.在此条件下,计算:1ab+1(a+1)(b+1)+1(a+2)(b+2)+…+1(a+2014)(b+2014)=

题目详情
已知|ab-2|+|a-1|=0,则:a=______,b=______.在此条件下,计算:1ab+1(a+1)(b+1)+1(a+2)(b+2)+…+1(a+2
已知|ab-2|+|a-1|=0,则:a=______,b=______.在此条件下,计算:
1
ab
+
1
(a+1)(b+1)
+
1
(a+2)(b+2)
+…+
1
(a+2014)(b+2014)
=______.
▼优质解答
答案和解析
由题意得,ab-2=0,a-1=0,
解得a=1,b=2,
所以,
1
ab
+
1
(a+1)(b+1)
+
1
(a+2)(b+2)
+…+
1
(a+2014)(b+2014)

=
1
1×2
+
1
2×3
+
1
3×4
+…+
1
2015×2016

=1-
1
2
+
1
2
-
1
3
+
1
3
-
1
4
+…+
1
2015
-
1
2016

=1-
1
2016

=
2015
2016

故答案为:1,2;
2015
2016