已知λ,μ为常数,且为正整数,λ≠1,无穷数列{an}的各项均为正整数,其前n项和为Sn,对任意的正整数n,Sn=λan﹣μ.记数列{an}中任意两不同项的和构成的集合为A.
(1)证明:无穷数列{an}为等比数列,并求λ的值;
(2)若2015∈A,求μ的值;
(3)对任意的n∈N*,记集合Bn={x|3μ•2n﹣1<x<3μ•2n,x∈A}中元素的个数为bn,求数列{bn}的通项公式.
(1)证明:无穷数列{an}为等比数列,并求λ的值;
(2)若2015∈A,求μ的值;
(3)对任意的n∈N*,记集合Bn={x|3μ•2n﹣1<x<3μ•2n,x∈A}中元素的个数为bn,求数列{bn}的通项公式.
更新时间:2016-12-04 01:30:39
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【知识点】 等差数列与等比数列综合应用
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解答题-证明题
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困难
(0.15)
解题方法
【推荐2】已知各项均为正数的两个数列
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(1)设
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(2)设
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