等差数列{An}的前n项和为Sn,且满足A3*A4=117,A2+A5=22 求通项An ；若数列{Bn}是等差数列,且

等差数列{An}的前n项和为Sn,且满足A3*A4=117,A2+A5=22 求通项An ；若数列{Bn}是等差数列,且 已知公差数列大于零的等差数列{an}的前n项和为Sn,且满足a3*a4=117,a2+a5=22 一道数列题目设等差数列{an}的前n项和为Sn,且满足a2²+a3²=a4²+a5 已知数列{an}是等比数列,其中a3=1,且a4,a5+1,a6成等差数列,数列{an/bn}的前n项和Sn=(n-1) 已知公差大于零的等差数列{an}的前n项和为Sn，且满足：a3•a4=117，a2+a5=22． 已知公差大于零的等差数列｛an｝的前n项和为Sn,且满足:a3*a4=117,a2+a5=22 已知公差数列大于零的等差数列{an}的前n项和为Sn,且满足a3*a4=117,a2+a5=22 （1）求数列{an}的 等差数列前n项和为Sn且a3a4=117,a2+a5=22,求通项an 若等差数列bn=Sn/（n+c）,求非零常数c 已知公差大于零的等差数列{an}的前n项和Sn,且满足a3*a4=117,a2+a5=22 {an}是等差数列,且a2+a4+a6=-12,a3+a5+a7=-6,如果{an}的前n项和sn取最小值,则n为多少? 设{an}是等差数列，{bn}是等比数列，Sn、Tn分别是数列{an}、{bn}的前n项和.若a3=b3，a4=b4，且 一道数学题：设数列An是公差不为0的等差数列.前n项和是Sn,满足(a2)^2+(a3)^2=(a4)^2+(a5)^2