已知等差数列{an},公差d大于0,且a2和a5是方程x^2-12x+27=0的两个根,数列{bn}的前n项和为Tn,且Tn=2-bn(1)求数列{an},{bn}的通项公式.(2)设{an}的前n项和为Sn,记cn=(Sn-λ)*bn,若C6为数列{cn}中最
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![已知等差数列{an},公差d大于0,且a2和a5是方程x^2-12x+27=0的两个根,数列{bn}的前n项和为Tn,且Tn=2-bn(1)求数列{an},{bn}的通项公式.(2)设{an}的前n项和为Sn,记cn=(Sn-λ)*bn,若C6为数列{cn}中最](/uploads/image/z/1767783-39-3.jpg?t=%E5%B7%B2%E7%9F%A5%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%2C%E5%85%AC%E5%B7%AEd%E5%A4%A7%E4%BA%8E0%2C%E4%B8%94a2%E5%92%8Ca5%E6%98%AF%E6%96%B9%E7%A8%8Bx%5E2-12x%2B27%3D0%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%A0%B9%2C%E6%95%B0%E5%88%97%7Bbn%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BATn%2C%E4%B8%94Tn%3D2-bn%EF%BC%881%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%EF%BD%9Ban%7D%2C%7Bbn%7D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F.%EF%BC%882%EF%BC%89%E8%AE%BE%EF%BD%9Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E8%AE%B0cn%3D%EF%BC%88Sn-%CE%BB%EF%BC%89%2Abn%2C%E8%8B%A5C6%E4%B8%BA%E6%95%B0%E5%88%97%EF%BD%9Bcn%EF%BD%9D%E4%B8%AD%E6%9C%80)
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