记等差数列{an}前n项和为Sn,求证{Sn/n}为等差数列?若a1=1且对任意正整数n,k n>k 都有根号下[S(n+k)]+根号下[S(n-k)]=2根号下(Sn)成立,求{an}通项公式记bn=a^(an) 就是a的an次方,a>0求证( b1+……bn)/n≤(b1
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![记等差数列{an}前n项和为Sn,求证{Sn/n}为等差数列?若a1=1且对任意正整数n,k n>k 都有根号下[S(n+k)]+根号下[S(n-k)]=2根号下(Sn)成立,求{an}通项公式记bn=a^(an) 就是a的an次方,a>0求证( b1+……bn)/n≤(b1](/uploads/image/z/12976615-55-5.jpg?t=%E8%AE%B0%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E6%B1%82%E8%AF%81%7BSn%2Fn%7D%E4%B8%BA%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%3F%E8%8B%A5a1%3D1%E4%B8%94%E5%AF%B9%E4%BB%BB%E6%84%8F%E6%AD%A3%E6%95%B4%E6%95%B0n%2Ck+n%3Ek+%E9%83%BD%E6%9C%89%E6%A0%B9%E5%8F%B7%E4%B8%8B%5BS%EF%BC%88n%2Bk%29%5D%2B%E6%A0%B9%E5%8F%B7%E4%B8%8B%5BS%28n-k%29%5D%3D2%E6%A0%B9%E5%8F%B7%E4%B8%8B%EF%BC%88Sn%29%E6%88%90%E7%AB%8B%2C%E6%B1%82%7Ban%7D%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%E8%AE%B0bn%3Da%5E%28an%29+%E5%B0%B1%E6%98%AFa%E7%9A%84an%E6%AC%A1%E6%96%B9%2Ca%3E0%E6%B1%82%E8%AF%81%28+b1%2B%E2%80%A6%E2%80%A6bn%29%2Fn%E2%89%A4%EF%BC%88b1)
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