2个等差数列{An}、{Bn}的前n项和之比为5n+3/2n-1.则A10/B10=多少?详细解答

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 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) {an}等差数列,an=21-2n,bn=|an|,求{bn}的前n项和Tnxx 等差数列除以等比数列 an=n bn=2^n-3 求an除以bn的前n项和 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 已知两个等差数列{an}和{bn}的前n项和分别为An和Bn, 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 等差数列{an}的前n项和sn=an^2+bn+c,则c= 已知{an},{bn}均为等差数列,前n项的和为An,Bn,且An/Bn=2n/(3n+1),求a10/b10的值 等差数列{An},{bn}的前n项和为An,Bn,且An/Bn=n/3n-2,则a5/b5=? 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 等差数列问题,疑惑,等差数列an bn的前n项和是S T S/T=2n/(3n+1)求an/bn怎么求, 等差数列{an} {bn}前n项和为An Bn,An/Bn=(7n+2)/(4n+27),求an/bn 等差数列{an} {bn}前n项和为An Bn,An/Bn=(7n+2)/(4n+27),求an/bn 已知等差数列{an},a2=9,a5=21,令bn=n*2^(an),求{bn}的前n项和Sn 十万火急!令bn=n*2^(an)求{bn}的前n项和Sn. 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. a1=1.an+1=2an+2^n.bn=an/2^n-1.证明bn是等差数列、求数列的前n项和sn? 证明：数列{an}为等差数列的充要条件是{an}前n项和Sn=An^2+Bn