若|a-2|+(b-1)²=0,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).+1/(a+2012)(b+2012)的值

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 00:34:22

若|a-2|+(b-1)²=0,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).+1/(a+2012)(b+2012)的值
若|a-2|+(b-1)²=0,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).+1/(a+2012)(b+2012)的值

若|a-2|+(b-1)²=0,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).+1/(a+2012)(b+2012)的值

由a-2=0 b-1=0
解得a=2 b=1
所以1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).+1/(a+2012)(b+2012)
=1/(1×2)+1/(2×3)+1/(3×4)+……+1/(2013×2014)
=(1-1/2)+(1/2-1/3)+……+(1/2013-1/2014)
=1-1/2014
=2013/2014

|a-2|+(b-1)²=0, 得 ,a-2 =0 , b-1=0 , a=2 ,b =1
1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).........+1/(a+2012)(b+2012)
=1/2 + 1/3*2 +1/4*3 +.............+ 1/ 2014* 2013
= 1-1/2 +1/2-1/3+1/3-1/4 +...

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|a-2|+(b-1)²=0, 得 ,a-2 =0 , b-1=0 , a=2 ,b =1
1/ab+1/(a+1)(b+1)+1/(a+2)(b+2).........+1/(a+2012)(b+2012)
=1/2 + 1/3*2 +1/4*3 +.............+ 1/ 2014* 2013
= 1-1/2 +1/2-1/3+1/3-1/4 +..........+1/2013- 1/2014
= 1-1/2014
= 2013 /2014
看懂了,给我个满意,没有其他任何要求!

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