Sn是等比数列an的前n项和,S3,S9,S6成等差数列,且a2+a5=2am,则m=?

设Sn是等比数列{an}的前n项和,S3,S9,S6,成等差数列,则公比q=? 设等比数列an的前n项和为sn 若s6:s3=1:2 求 s9:s3=? 已知Sn是等比数列an的前n项和,S3,S9,S6成等差数列,求证a2,a8,a5成等比数列 已知等比数列{an}中,a1=2,Sn是{an}的前n项和,若S9是S3和S6的等差中项,则a7= 已知等比数列【An】中,a1=2,Sn是【An】的前n项和,若S9是S3和S6的等差中项,则A7=? 设等比数列an的前n项的和为Sn,若S6/S3=3,则S9/S6= 设等比数列an的前n项的和为Sn,若S6/S3=3,则S9/S6= 等比数列{an}的前n项和为sn,若S3,S9,S6成等差数列,求此数列的公差, 设等比数列｛an｝的前n项和为Sn,若S3+S6=S9,求数列的公差q. 设等比数列{An}的前n项和为Sn,若S6/S3＝3,则S9/S6＝? 设等比数列an的前n项和为Sn,若S6/S3=3,则S9/S6= 设等比数列{an}的前n项和为sn,若s6/s3=3,则s9/s6= 设等比数列An的前n项和为Sn,若S3+S6=2S9,求公比q 设等比数列{An}前n项和为Sn,若S3+S6=2S9,求数列的公比q 等比数列{an}的前n项和为Sn,若S3+S6=2S9,求公比. 已知Sn是等比数列{an}的前n项和,a3、a9、a6、成等差数列,问已知Sn是等比数列{an}的前n项和,a3、a9、a6、成等差数列,问：S3、S9、S6是否成等差数列? 等比数列{an}前n项和sn若S6:S3=1:2,则S9:S3=____ 设等比数列｛an｝的前n项和是Sn,若S6/S3=3则S9/S6等于几答案是7/3希望