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,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

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

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

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}

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

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{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

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

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

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,

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