例3 已知公差大于零的等差数列{an}的前n项和Sn,且满足:a2·a4=65,a1+a5=18.(1)求数列{an}的通项公式an例3 已知公差大于零的等差数列{an}的前n项和Sn,且满足:a2·a4=65,a1+a5=18.(1)求数列{an}的通项
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![例3 已知公差大于零的等差数列{an}的前n项和Sn,且满足:a2·a4=65,a1+a5=18.(1)求数列{an}的通项公式an例3 已知公差大于零的等差数列{an}的前n项和Sn,且满足:a2·a4=65,a1+a5=18.(1)求数列{an}的通项](/uploads/image/z/303462-54-2.jpg?t=%E4%BE%8B3+%E5%B7%B2%E7%9F%A5%E5%85%AC%E5%B7%AE%E5%A4%A7%E4%BA%8E%E9%9B%B6%E7%9A%84%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CSn%2C%E4%B8%94%E6%BB%A1%E8%B6%B3%EF%BC%9Aa2%C2%B7a4%3D65%2Ca1%2Ba5%3D18.%EF%BC%881%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8Fan%E4%BE%8B3+%E5%B7%B2%E7%9F%A5%E5%85%AC%E5%B7%AE%E5%A4%A7%E4%BA%8E%E9%9B%B6%E7%9A%84%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CSn%2C%E4%B8%94%E6%BB%A1%E8%B6%B3%EF%BC%9Aa2%C2%B7a4%3D65%2Ca1%2Ba5%3D18.%EF%BC%881%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E9%80%9A%E9%A1%B9)
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