已知等比数列an前n项和为Sn,且满足Sn=3^n+k.公比为q=3,a1=2,通项公式an=2*3^(n-1),若数列bn满足(an+1)/2=(4+k)^(an*bn),求数列bn的前n项和Tn?Tn=9/4(1/2-1/2*3^n-n/3^n+1)怎么算啊?
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![已知等比数列an前n项和为Sn,且满足Sn=3^n+k.公比为q=3,a1=2,通项公式an=2*3^(n-1),若数列bn满足(an+1)/2=(4+k)^(an*bn),求数列bn的前n项和Tn?Tn=9/4(1/2-1/2*3^n-n/3^n+1)怎么算啊?](/uploads/image/z/7099714-10-4.jpg?t=%E5%B7%B2%E7%9F%A5%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97an%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E4%B8%94%E6%BB%A1%E8%B6%B3Sn%3D3%5En%2Bk.%E5%85%AC%E6%AF%94%E4%B8%BAq%3D3%2Ca1%3D2%2C%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8Fan%3D2%2A3%5E%28n-1%29%2C%E8%8B%A5%E6%95%B0%E5%88%97bn%E6%BB%A1%E8%B6%B3%EF%BC%88an%2B1%EF%BC%89%2F2%3D%EF%BC%884%2Bk%29%5E%28an%2Abn%29%2C%E6%B1%82%E6%95%B0%E5%88%97bn%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CTn%3FTn%3D9%2F4%281%2F2-1%2F2%2A3%5En-n%2F3%5En%2B1%29%E6%80%8E%E4%B9%88%E7%AE%97%E5%95%8A%EF%BC%9F)
已知等比数列an前n项和为Sn,且满足Sn=3^n+k.公比为q=3,a1=2,通项公式an=2*3^(n-1),若数列bn满足(an+1)/2=(4+k)^(an*bn),求数列bn的前n项和Tn?Tn=9/4(1/2-1/2*3^n-n/3^n+1)怎么算啊?
已知等比数列an前n项和为Sn,且满足Sn=3^n+k.
公比为q=3,a1=2,通项公式an=2*3^(n-1),若数列bn满足(an+1)/2=(4+k)^(an*bn),求数列bn的前n项和Tn?
Tn=9/4(1/2-1/2*3^n-n/3^n+1)怎么算啊?
已知等比数列an前n项和为Sn,且满足Sn=3^n+k.公比为q=3,a1=2,通项公式an=2*3^(n-1),若数列bn满足(an+1)/2=(4+k)^(an*bn),求数列bn的前n项和Tn?Tn=9/4(1/2-1/2*3^n-n/3^n+1)怎么算啊?
想知道满足后面的是:
an+1,还是a(n+1)
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