设Sn是等比数列的前n项和,S3,S9,S6成等差数列 求证a2,a8,a5成等差数列

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Sn是等比数列的前n项和,S3,S9,S6成等差数列 求证a2,a8,a5成等差数列 设等比数列an的前n项和为sn 若s6:s3=1:2 求 s9:s3=? 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= 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 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 设Sn是等比数列的前n项和,若S3,S9,S6成等差数列,这an的公比q为多少 设Sn是等比数列an的前n项和S3.S9.S6成等差数列,求a3.a9.a6成等差数列 设Sn是等比数列an的前n项和S3.S9.S6成等差数列,求a3.a9.a6成等差数列 设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　成等差数列 设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　成等差数列 设等比数列an的前n项的和为Sn,若S6/S3=1/2,则S9/S3=