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2017分之1加到2017分之2016等于多少?

1008

1+2+3+4+……+2017 =(1+2017)×2017÷2 =2018×2017÷2 =2035153

如图所示:

如图

1/2017+2/2017+3/2017+.....+2016/2017 =(1+2016)x2016÷2÷2017 =2017x1008÷2017 =1008

结果是0 (1+3十5+……+2017)一(2+4+6+……+2016) =(2018+2018+……2018)一(2018+2018+……2018) =0 前后两个括号里加数是相同的 每个括号的加数都是1009项 .

=1-1/2+1/2-1/3+1/3-1/4+…+1/2016-1/2017 =1-1/2017 =2016/2017 (2017分之2016) 你好,本题已解答,如果满意 请点右下角“采纳答案”。

设a=1/2+1/3+1/4+……+1/2017 b=1/2+1/3+1/4+1/5+……+1/2016 (1+1/2+1/3+1/4+……+1/2017)x(1/2+1/3+1/4+1/5+……+1/2016)-(1/2+1/3+1/4+……+1/2017)x(1+1/2+1/3+1/4+1/5+……+1/2016) =(1+a)b-a(1+b) =b+ab-a-ab =b-a =1/2016-1/2017 =1/4066272

|1/2017-1/2016|+|1/2016-1/2015|+|1/2015 -1| =1/(2016×2017)+1/(2015×2016)+2014/2015 =(2015+2017)/(2015×2016)+2014/2015 =2/2015+2014/2015 =2016/2015 =1又1/2015

1×1/3+3×5分之一+5×7分之一+……+2017分之1×2019分之一 =1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+……+1/2×(1/2017-1/2019) =1/2×(1-1/3+1/3-1/5+1/5-1/7+……+1/2017-1/2019) =1/2×(1-1/2019) =1/2×2018/2019 =1009/2019

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