已知数列an的前n项和为sn，且满足sn=an+n2–1

已知数列{an}的前n项和为Sn,满足Sn=n2an-n2(n-1),且a1=1/2,求{an}的通项已知数列{an}的前n项和为Sn,满足Sn=n2an-n2(n-1),且a1=1/2,求{an}的

已知数列{an}的前n项和为Sn,通项an满足Sn+an=1/2(n2+3n-2),求通项公式an.已知数列{an}的前n项和为Sn,通项an满足Sn+an=1/2(n2+3n-2),求通项公式an.

已知数列{an}的前n项和为Sn,且an=n2的n次方,则Sn=已知数列{an}的前n项和为Sn,且an=n2的n次方,则Sn=已知数列{an}的前n项和为Sn,且an=n2的n次方,则Sn=Sn=1

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

已知数列{an}的前n项和为Sn,且满足an+2Sn*Sn-1=0,a1=1/2.求证：{1/Sn}是等差数列已知数列{an}的前n项和为Sn,且满足an+2Sn*Sn-1=0,a1=1/2.求证：{

已知数列{an}a1=2前n项和为Sn且满足SnSn-1=3an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

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anRT,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a

正项数列an的前n项和为sn满足sn2-(n2n-1)sn-(n2n)=0求数列an的通项公式正项数列an的前n项和为sn满足sn2-(n2n-1)sn-(n2n)=0求数列an的通项公式正项数列an

已知数列an前n项的和为Sn且满足Sn=1-nann=自然数已知数列an前n项的和为Sn且满足Sn=1-nann=自然数已知数列an前n项的和为Sn且满足Sn=1-nann=自然数在式中令n=1得a1

已知数列｛an｝的前n项和为sn,且满足sn＝n已知数列｛an｝的前n项和为sn,且满足sn＝n已知数列｛an｝的前n项和为sn,且满足sn＝nan=Sn-S(n-1)=1说明是常数列啊an=1常数列

已知数列{an}满足an=1/3sn,sn为an的前n项和.且a1=1,求an的通项公式.要速已知数列{an}满足an=1/3sn,sn为an的前n项和.且a1=1,求an的通项公式.要速已知数列{a

已知数列{an}的前n项和为Sn=-n2-2n,求an已知数列{an}的前n项和为Sn=-n2-2n,求an已知数列{an}的前n项和为Sn=-n2-2n,求anan=Sn-Sn-1=-1-2nSn=

已知正项数列{an}的前n项和为sn,且满足sn+sn-1=kan^2+2求an已知正项数列{an}的前n项和为sn,且满足sn+sn-1=kan^2+2求an已知正项数列{an}的前n项和为sn,且

已知数列{an}的前n项和为Sn,且满足Sn=3/2(an-1)(n∈正整数)求an的通项公式已知数列{an}的前n项和为Sn,且满足Sn=3/2(an-1)(n∈正整数)求an的通项公式已知数列{a

已知正数数列{an}的前n项和为Sn,且对于任意正整数n满足2根号Sn=an+1求an通项已知正数数列{an}的前n项和为Sn,且对于任意正整数n满足2根号Sn=an+1求an通项已知正数数列{an}

已知正数数列{an}的前n项和为Sn,且对于任意正整数n满足2根号Sn=an+1求an通项已知正数数列{an}的前n项和为Sn,且对于任意正整数n满足2根号Sn=an+1求an通项已知正数数列{an}

已知正数数列{an}的前n项和为Sn,且对于任意正整数n满足2根号Sn=an+1求an通项已知正数数列{an}的前n项和为Sn,且对于任意正整数n满足2根号Sn=an+1求an通项已知正数数列{an}

已知数列{an}的前n项和Sn满足Sn=2/3an-1/3,且1已知数列{an}的前n项和Sn满足Sn=2/3an-1/3,且1已知数列{an}的前n项和Sn满足Sn=2/3an-1/3,且1由题意得

已知数列{An}的首项为1,前n项和为Sn,且满足An+1=3Sn,求{An}的通项公式已知数列{An}的首项为1,前n项和为Sn,且满足An+1=3Sn,求{An}的通项公式已知数列{An}的首项为

已知数列{an}各项均为正数,其前N项和为sn,且满足4sn=(an+1)^2.求{an}的通项公式已知数列{an}各项均为正数,其前N项和为sn,且满足4sn=(an+1)^2.求{an}的通项公式