设正项数列{an}的前n项和为Sn,满足Sn=n2.(1)求{an}的通项公式; 发布时间:2017-05-03 15:55 │ 来源:www.tikuol.com 题型:解答题 问题: 设正项数列{an}的前n项和为Sn,满足Sn=n2.(1)求{an}的通项公式;(2)设bn=1(an+1)(an+1+1),求数列{bn}的前n项的和Tn.(3)是否存在自然数m,使得m-24<Tn<m5对一切n∈N*恒成立?若存在,求出m的值;若不存在,说明理由.
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