设实数数列{an}的前n项和Sn满足Sn+1=an+1Sn(n∈N*),a1,S 发布时间:2017-05-01 01:18 │ 来源:www.tikuol.com 题型:填空题 问题: 设实数数列{an}的前n项和Sn满足Sn+1=an+1Sn(n∈N*),a1,S2-2a2成等比数列,则S2=______.
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