若等比数列an满足anan+1=16n,则公比为( )
若等比数列an满足anan+1=16n,则公比为( )
在数列{An}中,An小于0(n属于正整数),数列{AnAn+1}是公比为q的等比数列,且满足2AnAn+1+An+1A
已知数列{an}满足条件:a1=1,a2=r,且数列{anan+1}是公比为q的等比数列.设bn =a(2n-1)+a(
数列{an}中,a1=2,a2=3,且{anan+1}是以3为公比的等比数列,若bn=2a2n-1+a2n(n为正整数)
已知数列{an}和{bn}满足:a1=1,a2=2,an>0,bn=根号anan+1,且{bn}是以q为公比的等比数列.
已知数列{an}和{bn}满足a1=1,a2=2,an>0,bn=√anan+1,且{bn}是以q为公比的等比数列
已知数列{an}满足条件:a1=1,a2=r(r>0{anan+1}是公比为q(q>0)的等比数列.设bn =a(2n-
已知数列{an}和{bn}满足a1=1,a2=2,a4>0,bn=√anan+1,且{bn}是以q为公比的等比数列
数列啊,好难已知数列An和Bn满足A1=1,A2=2,An>0,Bn=√(AnAn+1),且Bn是以q为公比的等比数列,
(1/2)已知数列an满足条件:a1=1.a2=r.(r>0)且{anan+1}是公比为q的等比数列,设bn=a2n-1
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( )
正项数列{an}满足a1=1,a2=2,{根号下an*a(n+1)}是以1/2为公比的等比数列,则使得不等式1/a1+1