数列{bn}(n∈N*)是递增的等比数列,且b1+b3=5,b1•b3=4.(1 发布时间:2017-04-27 18:59 │ 来源:www.tikuol.com 题型:解答题 问题: 数列{bn}(n∈N*)是递增的等比数列,且b1+b3=5,b1•b3=4.(1)若an=log2bn+3,求证:数列{an}是等差数列;(2)若a21+a2+a3+…+am≤a46,求m的最大值.
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