数列,超难设数列{an}的前n项和为Sn,对任意的正整数n,都有an=5Sn+1成立,记bn=(4+an)/(1-an)(n∈N+),(1) 求数列{an}与数列{bn}的通项公式(2) 设数列{bn}的前n项和为Rn,是否存在正整数k,使得Rn≥4k
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![数列,超难设数列{an}的前n项和为Sn,对任意的正整数n,都有an=5Sn+1成立,记bn=(4+an)/(1-an)(n∈N+),(1) 求数列{an}与数列{bn}的通项公式(2) 设数列{bn}的前n项和为Rn,是否存在正整数k,使得Rn≥4k](/uploads/image/z/693633-57-3.jpg?t=%E6%95%B0%E5%88%97%2C%E8%B6%85%E9%9A%BE%E8%AE%BE%E6%95%B0%E5%88%97%EF%BD%9Ban%EF%BD%9D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E5%AF%B9%E4%BB%BB%E6%84%8F%E7%9A%84%E6%AD%A3%E6%95%B4%E6%95%B0n%2C%E9%83%BD%E6%9C%89an%3D5Sn%2B1%E6%88%90%E7%AB%8B%2C%E8%AE%B0bn%3D%284%2Ban%29%2F%281-an%29%28n%E2%88%88N%2B%29%2C%281%29+%E6%B1%82%E6%95%B0%E5%88%97%EF%BD%9Ban%EF%BD%9D%E4%B8%8E%E6%95%B0%E5%88%97%EF%BD%9Bbn%EF%BD%9D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%282%29+%E8%AE%BE%E6%95%B0%E5%88%97%EF%BD%9Bbn%EF%BD%9D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BARn%2C%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E6%AD%A3%E6%95%B4%E6%95%B0k%2C%E4%BD%BF%E5%BE%97Rn%E2%89%A54k)
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