等比数列{an}的公比q>0,已知a2=6,a n+2-3an=2a n+1,则{an}的前4项和S4=
等比数列{an}的公比q>0,已知a2=6,a n+2-3an=2a n+1,则{an}的前4项和S4=
11题 填空等比数列{an}的公比q>0,已知a2=1,a(n+2)+啊(n+1)=6an,则{an}的前4项和S4=?
等比数列{an}的公比q>0,已知a2=1,an+2+an+1=6an则{an}的前4项和S4=( )
设等比数列{an}的公比q=2,前n项和为Sn,S4\a2
设等比数列{an}的公比q=2,前n项和为Sn,则S4/a2=?
设等比数列an的公比q=2,前n项和为sn,则s4\a2=
设等比数列an的公比q=2,前n项和为sn,则s4除以a2=
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/a2等于多少
设等比数列{an}的公比q=1/2,前n项和为Sn,则S4/a4=
设等比数列an的公比q=1/2,前n项和为sn,则s4/a4=