已知等比数列{an}满足a3=12,a8=3/8,记其前n项和为sn,求数列{an}通项公式an;若sn=93,求n
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![已知等比数列{an}满足a3=12,a8=3/8,记其前n项和为sn,求数列{an}通项公式an;若sn=93,求n](/uploads/image/z/13390639-7-9.jpg?t=%E5%B7%B2%E7%9F%A5%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%7Ban%7D%E6%BB%A1%E8%B6%B3a3%3D12%2Ca8%3D3%2F8%2C%E8%AE%B0%E5%85%B6%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BAsn%2C%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8Fan%EF%BC%9B%E8%8B%A5sn%3D93%2C%E6%B1%82n)
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