若等比数列{an}的前n项和为Sn=32n+1+t,则公比q等于______,t=______.
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=______.
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=______.
已知等比数列{an}的前n项和为Sn,a1=1,S3=13,则公比q=______.
设等比数列{an}的公比为q,前n项和为Sn,若Sn+1,Sn,Sn+2成等差数列,则q等于多少?若an=1,求sn前n
已知等比数列{an}的前n项和Sn=t•5n-1,则实数t的值为______.
设等比数列 {an} 的公比为q,前n项和为Sn,若S(n+1),Sn,S(n+2)成等差数列,则q=
设等比数列{an}的公比为q,前n项和为Sn,若Sn+1,Sn,Sn+2成等差数列,则q=?
设Sn使等比数列{an}的前n项和,若S3=3a3,则公比q=______.
设等比数列{an}的公比q=2,前n项和为Sn,则S4/a2等于
设等比数列{an}的公比q=2,前n项和为Sn,则S4/a2等于( )
设等比数列{an}的公比q=2,前n项和为Sn,则S4/S2等于
设等比数列{an}的公比q=2,前n项和为Sn,则S4/a2等于多少