已知数列an的前n项和为Sn,且满足anSn=2n1.(1).求证：数列{an-2}是等比数列

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}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

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}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,且满足3an=3+2Sn.求数列an通项公式?已知数列an的前n项和为Sn,且满足3an=3+2Sn.求数列an通项公式?已知数列an的前n项和为Sn,且满足3an=3+

已知正项数列an的前n项和为sn,且满足：an平方=2sn-an（n属于N*).求an的通项公式；2.求数列｛an,2an(此an已知正项数列an的前n项和为sn,且满足：an平方=2sn-an（n属

已知数列an满足bn=an-3n,且bn为等比数列,求an前n项和Sn已知数列an满足bn=an-3n,且bn为等比数列,求an前n项和Sn已知数列an满足bn=an-3n,且bn为等比数列,求an前

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：{

三校生数学,an和sn的关系.已知数列{an}中,an>0,前n项之和为An,且满足An三校生数学,an和sn的关系.已知数列{an}中,an>0,前n项之和为An,且满足An=1/8(an+2)&#

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

已知数列{an}中,an>0,前n项和为Sn,且满足Sn=1/8(an+2)^2.求证数列{an}是等差数列.已知数列{an}中,an>0,前n项和为Sn,且满足Sn=1/8(an+2)^2.求证数列

已知正整数数列｛an｝中,其前n项和为sn,且满足Sn=1/8(an+2）2求｛an｝的通项公式已知正整数数列｛an｝中,其前n项和为sn,且满足Sn=1/8(an+2）2求｛an｝的通项公式已知正整

已知数列{an}的前n项和为sn,且满足sn=1/2（an+1）.求通项公式an.已知数列{an}的前n项和为sn,且满足sn=1/2（an+1）.求通项公式an.已知数列{an}的前n项和为sn,且