已知等比数列{an}满足an>0,n=1,2等,且a5*a(2n-5)=2的2n次方,则当n≥1时log2a1+log2
已知等比数列{an}中满足an大于0,n为正整数且a5*a2n-5=2的2n次方则n大于等于1时,loga1+loga2
已知等比数列{an}为递增数列,且a5²=a10,2[an+a(n+2)]=5a(n+1),则数列{an}的通
已知数列an中满足a1=1且当n.=2时,2an*a*(n-1)+an-a(n-1)=0,求通项公式an
已知数列an是首项a1=32,公比q=1/2的等比数列,数列bn满足bn=1/n(log2a1+log2a2+…+log
已知数列{an}满足anan-1=an-1+(-1)n次方(n≥2),且a1=1,则a5/a3=
已知数列{an}满足a0=1,an=a0+a1+a2+...+a(n-1) (n≥2且n属于N*),则当n属于N*时an
等比数列{an}满足:a1=1/2,且an-an-1=1/2的n次方,求an
已知数列{an}满足a1=1,a(n+1)=3an+2(n属于N) 1.求证数列{an+1}是等比数列 2.求{an}的
设等比数列{an}的前n项和为Sn,已知a1=2011,且an+2an+1+an+2=0(N∈N*),则S2012?
已知数列an的前n项和为Sn,且Sn=(1/2)的n次方+a,若an为等比数列,则a=多少?
通项公式为an=an^2+n的数列,若满足a1<a2<a3<a4<a5,且an>a(n+1)对n≥8恒成立,则实数a的取
已知数列{an}满足a1=1/5,且当n>1,n∈N*时,有a(n-1)/an=2a(n-1)+1/1-2an,设bn=