(2014•南宁二模)设等比数列{an}的前n项和为Sn,若a1=1,S6=4S3,则a10=______.
(2014•南宁二模)设等比数列{an}的前n项和为Sn,若a1=1,S6=4S3,则a10=______.
设等比数列{an}的前n项和为Sn,若S6:S3=1:2,则S9:S3=?
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sn是等比数列{an}的前n项和,是s3/s6=1/3.则s6/s12=
已知正项等比数列{an}的前n项和为Sn,若S3=3,S9-S6=12,则S6=______.
设等比数列an的前n项的和为Sn,若S6/S3=1/2,则S9/S3=
等比数列{an}的前n项和为sn,若s3+s6=2s9,则数列的公比为______.
设等比数列{an}中,前n项和为Sn,已知S3=8,S6=7,则a7+a8+a9=______.
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是等差数列An的前n项和,若S3/S6=1/3,则S6/S12等于
设等差数列{an}的前n项和为Sn,若S3=9,S6=36,则a7+a8+a9=______.