已知公差为d的等差数列an,其前n项和为Sn.等比为q的等比数列bn,其前n项和为Tn.已知a1=b1=1,S1+Sn\3=T2,a8=b3.(1)求数列an和bn的通项公式.(2)令Cn=anbn,求数列Cn的前n项和Rn.没打错啊..第二项是3分之Sn
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![已知公差为d的等差数列an,其前n项和为Sn.等比为q的等比数列bn,其前n项和为Tn.已知a1=b1=1,S1+Sn\3=T2,a8=b3.(1)求数列an和bn的通项公式.(2)令Cn=anbn,求数列Cn的前n项和Rn.没打错啊..第二项是3分之Sn](/uploads/image/z/2779405-61-5.jpg?t=%E5%B7%B2%E7%9F%A5%E5%85%AC%E5%B7%AE%E4%B8%BAd%E7%9A%84%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97an%2C%E5%85%B6%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn.%E7%AD%89%E6%AF%94%E4%B8%BAq%E7%9A%84%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97bn%2C%E5%85%B6%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BATn.%E5%B7%B2%E7%9F%A5a1%3Db1%3D1%2CS1%2BSn%5C3%3DT2%2Ca8%3Db3.%EF%BC%881%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97an%E5%92%8Cbn%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F.%282%29%E4%BB%A4Cn%3Danbn%2C%E6%B1%82%E6%95%B0%E5%88%97Cn%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CRn.%E6%B2%A1%E6%89%93%E9%94%99%E5%95%8A..%E7%AC%AC%E4%BA%8C%E9%A1%B9%E6%98%AF3%E5%88%86%E4%B9%8BSn)
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