若Sn是公比为q的等比数列{an}的前n项和,且S4,S6,S5成等差数列,则公比q=______.
若Sn是公比为q的等比数列{an}的前n项和,且S4,S6,S5成等差数列,则公比q=______.
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.
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
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=( )
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=______.
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.则q3的值是( )
已知Sn是等比数列{an}得前n项和,S2,S6,S4成等差数列,求数列{an}的公比q?
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,则q的三次方等于多少,
设{an}是公比为q的等比数列,Sn是它的前n项和.若{Sn}是等差数列,则q=______.
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Sn是等比数列{An}的前n次和,S2,S6,S4成等差数列,求数列{An}的公比q