已知等比数列{an},Sn是其前n项和,且a1+a3=5,S4=15,设bn=(5/2)+log2(an),求数列{bn已知等比数列{an},Sn是其前n项和,且a1+a3=5,S4=15,设bn=(5/2)+log2(an),求数列{bn}的前n项和Tn.
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![已知等比数列{an},Sn是其前n项和,且a1+a3=5,S4=15,设bn=(5/2)+log2(an),求数列{bn已知等比数列{an},Sn是其前n项和,且a1+a3=5,S4=15,设bn=(5/2)+log2(an),求数列{bn}的前n项和Tn.](/uploads/image/z/2735822-38-2.jpg?t=%E5%B7%B2%E7%9F%A5%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%7Ban%7D%2CSn%E6%98%AF%E5%85%B6%E5%89%8Dn%E9%A1%B9%E5%92%8C%2C%E4%B8%94a1%2Ba3%3D5%2CS4%3D15%2C%E8%AE%BEbn%3D%285%2F2%29%2Blog2%28an%29%2C%E6%B1%82%E6%95%B0%E5%88%97%7Bbn%E5%B7%B2%E7%9F%A5%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%7Ban%7D%2CSn%E6%98%AF%E5%85%B6%E5%89%8Dn%E9%A1%B9%E5%92%8C%2C%E4%B8%94a1%2Ba3%3D5%2CS4%3D15%2C%E8%AE%BEbn%3D%EF%BC%885%2F2%EF%BC%89%2Blog2%28an%29%2C%E6%B1%82%E6%95%B0%E5%88%97%7Bbn%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CTn.)
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