设sn为等比数列an的前n项和,若a1=1,且3S1,2S2,S3成等比数列,

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设sn为等比数列an的前n项和,若a1=1,且3S1,2S2,S3成等比数列,
设数列{an}的前n项和为Sn,且an不等于0,S1,S2,S3 Sn成等比数列,试问a1,a2,a2是等比数列吗

设数列{an}的前n项和为Sn,且an不等于0,S1,S2,S3Sn成等比数列,试问a1,a2,a2是等比数列吗设数列{an}的前n项和为Sn,且an不等于0,S1,S2,S3Sn成等比数列,试问a1

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列1 ,求{an}的公比q2 ,若a1-a3=3求Sn

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列1,求{an}的公比q2,若a1-a3=3求Sn等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列1,求{an}的公比q2

等比数列an的前n项和为sn 已知s1 s3 s2成等差数列 求an的公比q 求若a1-a3=3 求sn

等比数列an的前n项和为sn已知s1s3s2成等差数列求an的公比q求若a1-a3=3求sn等比数列an的前n项和为sn已知s1s3s2成等差数列求an的公比q求若a1-a3=3求sn等比数列an的前

设等差数列an的前n项和为Sn,a1=3/2,且s1,s2,s4成等比数列,求sn

设等差数列an的前n项和为Sn,a1=3/2,且s1,s2,s4成等比数列,求sn设等差数列an的前n项和为Sn,a1=3/2,且s1,s2,s4成等比数列,求sn设等差数列an的前n项和为Sn,a1

设等差数列〔an〕的前n项和为Sn,a1=3/2,且S1,S2,S4成等比数列,求Sn.

设等差数列〔an〕的前n项和为Sn,a1=3/2,且S1,S2,S4成等比数列,求Sn.设等差数列〔an〕的前n项和为Sn,a1=3/2,且S1,S2,S4成等比数列,求Sn.设等差数列〔an〕的前n

等比数列{an},前n项和为Sn,若S1,2S2,3S3成等差数列,求{an}的公比

等比数列{an},前n项和为Sn,若S1,2S2,3S3成等差数列,求{an}的公比等比数列{an},前n项和为Sn,若S1,2S2,3S3成等差数列,求{an}的公比等比数列{an},前n项和为Sn

等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列,求{an}的公比Q.已知a1-a3=3,求sn?

等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列,求{an}的公比Q.已知a1-a3=3,求sn?等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列,求{an}的公比

等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列,求{an}的公比Q.已知a1-a3=3,求sn?RT.

等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列,求{an}的公比Q.已知a1-a3=3,求sn?RT.等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列,求{an}

等比数列{An}的前n项的和为Sn,已知S1,S3,S2成等差数列 1)求{An}的公比q 2)若A1-A3=3,求Sn

等比数列{An}的前n项的和为Sn,已知S1,S3,S2成等差数列1)求{An}的公比q2)若A1-A3=3,求Sn等比数列{An}的前n项的和为Sn,已知S1,S3,S2成等差数列1)求{An}的公

等比数列{an}的前n项和为Sn已知S1,S3,S2成等差数列,(1)求{an}的公比q(2)若a1-a3=3,求Sn

等比数列{an}的前n项和为Sn已知S1,S3,S2成等差数列,(1)求{an}的公比q(2)若a1-a3=3,求Sn等比数列{an}的前n项和为Sn已知S1,S3,S2成等差数列,(1)求{an}的

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.(1)求{an}的公比q.(2)若a1-a3=3,求Sn.

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.(1)求{an}的公比q.(2)若a1-a3=3,求Sn.等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.(1)求{

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.(1)求{an}的公比q;(2)若a1-a3=3,求Sn

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.(1)求{an}的公比q;(2)若a1-a3=3,求Sn等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.(1)求{a

等比数列{an}的前n项和为Sn,已知S1,S2,S3成等差数列 (1)求{an}的公比q (2)若a1-a3=3,求Sn

等比数列{an}的前n项和为Sn,已知S1,S2,S3成等差数列(1)求{an}的公比q(2)若a1-a3=3,求Sn等比数列{an}的前n项和为Sn,已知S1,S2,S3成等差数列(1)求{an}的

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.①求公比q②a1-a3=3,求Sn

等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.①求公比q②a1-a3=3,求Sn等比数列{an}的前n项和为Sn,已知S1,S3,S2成等差数列.①求公比q②a1-a3=3,求Sn

等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2*S2=64,b3*S3=960.求an,bn.求和1/S1+1/S2+...Sn

等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2*S2=64,b3*S3=960.求an,bn.求和1/S1+1/S2+...Sn等差数列{an}的各项均

已知等比数列{an}的前n项和为Sn,a1 =1.S1、2S2、3S3成等差数列,求数列{an}的通项公式

已知等比数列{an}的前n项和为Sn,a1=1.S1、2S2、3S3成等差数列,求数列{an}的通项公式已知等比数列{an}的前n项和为Sn,a1=1.S1、2S2、3S3成等差数列,求数列{an}的

等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列.问:若a1-a3=3,求数列S1、S3、S2的公差d.

等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列.问:若a1-a3=3,求数列S1、S3、S2的公差d.等比数列{an}中,前n项和为sn,已知S1,S3,S2成等差数列.问:若a1

等比数列的前n和为Sn,已知S1,S3,S2成等比数列,求 1,公比q.等比数列的前n和为Sn,已知S1,S3,S2成等比数列,求 1,公比q. 2,若a1-a3=3,求Sn.

等比数列的前n和为Sn,已知S1,S3,S2成等比数列,求1,公比q.等比数列的前n和为Sn,已知S1,S3,S2成等比数列,求1,公比q.2,若a1-a3=3,求Sn.等比数列的前n和为Sn,已知S

设数列an的前n项和为sn,且an≠0,s1,s2,s3……成等比数列,则数列a1,a2,a3……成等比数列吗

设数列an的前n项和为sn,且an≠0,s1,s2,s3……成等比数列,则数列a1,a2,a3……成等比数列吗设数列an的前n项和为sn,且an≠0,s1,s2,s3……成等比数列,则数列a1,a2,

已知等比数列的首项a1=1,公比为q,前n项和为Sn,设q≥2,bn=S2/S1+S3/S2+...+Sn+1/Sn,bn≥3n.求q的最小值

已知等比数列的首项a1=1,公比为q,前n项和为Sn,设q≥2,bn=S2/S1+S3/S2+...+Sn+1/Sn,bn≥3n.求q的最小值已知等比数列的首项a1=1,公比为q,前n项和为Sn,设q