若等差数列{an}与{bn}的前n项之和分别为Sn和Tn,若Sn/Tn=(5n+2)/(7n-1),则a10/b10=

已知等差数列{an}和{bn},他们的前n项之和为An和Bn,若An/Bn=(5n+3)/(2n-1)A9/B9 设Sn,Tn分别是两个等差数列{an}{bn}的前n项之和,若Sn/Tn=7n+1/4n+27,则an:bn=? 设等差数列{an}与{bn}的前n项之和为Sn,S`n,Sn/S`n=7n+2/n+3,求a7/b7 若数列{An}满足前n项之和Sn=2An-4(n∈N*),Bn+1=An+2Bn,且B1=2（1）求数列{An}的通项公式An (2)求证数列{(Bn)/2^n}是等差数列,并求Bn（3）求数列{Bn}的前N项个Tn麻烦写详细过程 等差数列{an}的前n项和为An,等差数列{bn}的前n项和为Bn若Bn/An=n/3n+1 1.求a5/b5 2 an/bn 若等差数列{an}与{bn}的前n项之和分别为Sn和Tn,若Sn/Tn=(5n+2)/(7n-1),则a10/b10= 等差数列{An},{Bn}的前n项和分别为Sn与Tn.若Sn/Tn=2n/(3n+1),则An/Bn=____.等差数列｛An},{Bn}的前n项和分别为Sn与Tn.若Sn/Tn=2n/(3n+1),则An/Bn=____. 若两个等差数列｛an｝、{bn}的前n项和An、Bn,且满足An/Bn=(4n+2)/(5n-5),则a13/b13 请证明：若数列{n}与{bn}都是等差数列,它们的前n项和分别为Sn,Tn,则an/bn=S2n-1/T2n-1 等差数列{an}与{bn},它们的前n项之和分别为Sn,S'n,如果Sn/S'n=(7n+1)/(4n+27)(n∈N*),则a11/b11的值是 已知两个等差数列{an}和{bn}的前n项和分别为An和Bn, 等差数列{an},{bn}的前n项和分别为An,Bn,切An/Bn=2n/3n+1,求lim(n→∞)an/bn 1.已知等差数列{an}与{bn}的前n项之和分别是Sn与Tn,若Sn/Tn=（2n+2）/（n+3）,求a7/b7的值.2.设等差数列{an}的前n项之和为Sn,若a3=12,S12>0,S130,n>=2,n属于正整数).(1)求证{an}是等比数列,并求公比f（t）；(2) 计算等差数列{an}{bn}的前n项和分别为An.Bn,且An/Bn=2n/(n+1)求limn→∞(an/bn) 若两个等差数列{an}和{bn}的前n项An和Bn,满足关系式An/Bn=2n+1/4n+27（n∈N*),求an/bn. 等差数列{An},{Bn}的前n项和为Sn与Tn,若Sn/Tn=2n/3n+1,则An/Bn的值是?2n-1/3n-1. 设等差数列{an}与{bn}的前n项之和分别为:Sn与Tn,且Sn/Tn=(6n+2)/(2n+3),求a8/b8的值 {an}等差数列,an=21-2n,bn=|an|,求{bn}的前n项和Tnxx