设等比数列{an}的前n项和为Sn,若S3+S6=S9,则数列{an}的公比q是______.
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=______.
等比数列{an}的前n项和为sn,若s3+s6=2s9,则数列的公比为______.
已知Sn是等比数列{an}的前n项和,设公比为q,且S3,S9,S6成等差数列.
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
设等比数列an的前n项的和为Sn,若S6/S3=3,则S9/S6=
1.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=1:2,则S9:S3=?
已知等比数列{An}的公比为q,前n项的和为Sn,且S3,S9,S6成等差数列.
已知等比数列{An}的公比为q,前n项和为Sn,且S3,S9,S6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.
等比数列{an}的公比为q,其前n项和为Sn,若S3,S9,S6成等差数列,则q^3=
已知等比数列{an}的公比为q,前n项和为Sn,且 S3,S9,S6 成等差数列,则q^3=( )