设数列{an}的前n项和为Sn,且满足2an−Sn=1, n∈N*.在数列{an}的每两项之间都按照如下规则插入一些数后
设数列{an}前n项和为Sn,数列{Sn}的前n项和为Tn,满足Tn=2Sn-n2,n∈N*.
设各项都为正数的数列an 前n项和为sn 且满足Sn=1/2(an+1/an)
设数列{an}的前n项和为Sn,且满足an=2-Sn(n∈N*).
设数列{an}的前n项和为Sn,满足2Sn=an+1-2^n+1+1,且a1,a2+5.a3成等差数
数列{an}的前n项和为Sn,且Sn=13(an−1)
设数列{an}的前n项和为Sn,对任意n∈N*满足2Sn=an(an+1),且an≠0 (1)求数列an的通项公式
设数列{an}的前n项和为Sn,且Sn=2^n-1.
设数列an的前n项和为Sn,a1=1,an=(Sn/n)+2(n-1)(n∈N*) 求证:数列an为等差数列,
设数列{an}的前n项和为Sn,且2an=Sn+2n+1(n∈N*).
已知数列{an}的前n项和为Sn,且满足Sn=2an-1,n为正整数,求数列{an}的通项公式an
已知数列{an}a1=2前n项和为Sn 且满足Sn Sn-1=3an 求数列{an}的通项公式an
已知数列{an}的前n项和为Sn,且满足Sn=2an-1(n属于正整数),求数列{an}的通项公式an