已知等差数列前n项和为Sn,S6/S3=3 求S9除S6

等比数列前n项和Sn,S6/S3=3,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项的和为Sn,若S6/S3=3,则S9/S6= 已知Sn是等比数列{An}的前N项和,S3,S9,S6成等差数列,则 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=( ) 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项的和为Sn,且S3,S9,S6成等差数列. 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Sn是首项为a的等比数列{an}的前n项和,S3,S9,S6成等差数列 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, 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项和为sn,若S6,S9,S3成等差数列,问2S3,S6,S12-S6S能否成等比数列?请说明理