设等比数列{an}的公比为q,前n项和为Sn,求数列{Sn}的前n项和Un
设等比数列{an}的公比为q,前n项和为Sn,求数列{Sn}的前n项和Un
设数列an为公比为q的等比数列,它的前n项和为sn,若数列sn为等差数列,则q的值
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,则公比q为( )
已知数列{an}是首项为a1,公比为q(q>0)的等比数列,前n项和为sn,求(sn/(sn+1))的极限 我就想问一
设等比数列{an}的公比q=2,前n项和为Sn,S4\a2
设等差数列{an}的前n项和为Sn,等比数列{bn}的前n项和为Tn,已知数列{bn}的公比为q(q>0)
等比数列{an},a1=a,公比为q,Sn是它的前n项和,求数列{Sn}的前n项和Tn
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,求q的值
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
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=?
已知等比数列{an}的公比为q,前n项和为Sn,求[Sn*Sn+2-(Sn+1)^2]/[an*an+2]
已知数列an的前n项和为Sn,数列根号Sn+1是公比为2的等比数列