等差数列an,bn前n项和分别为sntn且sn除夕

两个等差数列{An}{Bn}前n项和分别为SnTn且Sn/Tn=3n两个等差数列{An}{Bn}前n项和分别为SnTn且Sn/Tn=3n两个等差数列{An}{Bn}前n项和分别为SnTn且Sn/Tn=

等差数列【An】与【bn】的前n项和分别为SnTn且Sn/Tn=(2n+2)/(n+3),求a6除以b9的值等差数列【An】与【bn】的前n项和分别为SnTn且Sn/Tn=(2n+2)/(n+3),求

已知anbn都是等差数列,其中n项和分别为sntn,若sn/tn=n/2n+1求a5/b5.求sn/bn已知anbn都是等差数列,其中n项和分别为sntn,若sn/tn=n/2n+1求a5/b5.求s

等差数列前几项和SnTn,Sn/Tn=2n/3n+1求an/bn等差数列前几项和SnTn,Sn/Tn=2n/3n+1求an/bn等差数列前几项和SnTn,Sn/Tn=2n/3n+1求an/bn等差数列

等差数列｛an｝｛bn｝的前n项和分别为Sn、Tn,且an:bn=2n-1:3n-1,则S2n+1：T2n+1=?等差数列｛an｝｛bn｝的前n项和分别为Sn、Tn,且an:bn=2n-1:3n-1,

等差数列an和bn的前n项和分别为sn和tn,且sn/tn=2n/3n+1,则a5/b5=?等差数列an和bn的前n项和分别为sn和tn,且sn/tn=2n/3n+1,则a5/b5=?等差数列an和b

等差数列｛An｝和｛Bn｝的前n项和分别为Sn和Tn,且Sn/Tn=(2n+1)/(3n+2),则：A6/B6=?等差数列｛An｝和｛Bn｝的前n项和分别为Sn和Tn,且Sn/Tn=(2n+1)/(3

等差数列{an},{bn}的前n项和分别为Sn,Tn,且an/bn=2n+1/3n+1,则S11/T11=,S2n-1/T2n-1=等差数列{an},{bn}的前n项和分别为Sn,Tn,且Sn/Tn=

已知{an}{bn}都为等差数列,前n项的和分别为Sn,Tn,且Sn/Tn=5n/6n+1,求a5/b5.已知{an}{bn}都为等差数列,前n项的和分别为Sn,Tn,且Sn/Tn=5n/6n+1,求

两等差数列{an}和{bn},前n项和分别为Sn,Tn且Sn/Tn=7n+2/n+3则a2+a20/b7+b15=两等差数列{an}和{bn},前n项和分别为Sn,Tn且Sn/Tn=7n+2/n+3则

等差数列an,bn的前n项和分别为sn和tn且sn/tn=3n-1/2n+1,求a3/a4的值等差数列an,bn的前n项和分别为sn和tn且sn/tn=3n-1/2n+1,求a3/a4的值等差数列an

{an},{bn}是两个等差数列,其前n项和分别为Sn和Tn,且Sn/Tn=(7n+2)/(n+3),则a8/b8={an},{bn}是两个等差数列,其前n项和分别为Sn和Tn,且Sn/Tn=(7n+

已知两个等差数列{an}、{bn}的前n项和分别为Sn,Tn,且Sn/Tn=7n+1/4n+27,则a11/b11=已知两个等差数列{an}、{bn}的前n项和分别为Sn,Tn,且Sn/Tn=7n+1

等差数列{an},{bn}的前n项和分别为Sn,Tn,且Sn/Tn=(2n-1)/(3n+2),则a5/b5等差数列{an},{bn}的前n项和分别为Sn,Tn,且Sn/Tn=(2n-1)/(3n+2

等差数列{an},{bn},的前n项和分别为Sn,Tn且Sn/Tn=(3n-1)/(2n+3)则a8/b8=快.等差数列{an},{bn},的前n项和分别为Sn,Tn且Sn/Tn=(3n-1)/(2n

等差数列{an},{bn},的前n项和分别为Sn,Tn且Sn/Tn=(7n+2)/(3n+4)则a10/b10=等差数列{an},{bn},的前n项和分别为Sn,Tn且Sn/Tn=(7n+2)/(3n

已知两个等差数列{an}和{bn}的前n项和分别为sn,tn且sn/tn=(7n+45)/n+3则使得an/bn为整数的正整数n的个数为多少已知两个等差数列{an}和{bn}的前n项和分别为sn,tn

一道数学等差数列题!要过程呀!等差数列{An}与{Bn}的前n项和分别为Sn和Sn'',且Sn/Sn''=(7n+2)/(n+3),求A7/B7的值!一道数学等差数列题!要过程呀!等差数列{An}与{Bn

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)计算等差数列{an}{bn}的前n项和分别为An.Bn,且An/Bn=2n/(n+1)

等差数列{an},{bn}的前n项和分别为Sn,Tn,且Sn/Tn=(7n+45)/(n-3),则使an/bn为正整数的n的个数是多少?等差数列{an},{bn}的前n项和分别为Sn,Tn,且Sn/T