已知等差数列{an}的前4项和为10,且a2,a3,a7成等比数列,求数列{an 发布时间:2017-04-27 06:12 │ 来源:www.tikuol.com 题型:解答题 问题: 已知等差数列{an}的前4项和为10,且a2,a3,a7成等比数列,求数列{an}的通项公式.
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