已知数列{an},{an}=(n+1)/(n2(n+2)2).则Sn=

已知数列｛an｝中,an=n/n+1,判断数列｛an｝的增减性 已知数列{an}满足an+1=an+n,a1等于1,则an=? 已知数列an,a1=1 an+1-an=2的n次幂求an 已知数列an中,a1=1,an+1=an+n,求an 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列an,an^2 +1/an=2n,求an 已知数列an,an属于n*,sn=1/8*(an+2)^2,{an}是等差数列 已知数列{An}中,a1=4,an+1+an=6n+3,求证数列an-3n是等比数列,求证数列an的通项an 已知数列{an}中,a1=1,an+1=3an/(an+3)(N∈N*),求通项an, 已知数列{an}满足a(n+1)=an+n,a1=1,则an= 已知数列｛an｝中,a(n+1)=an+2^n,a1=3,求an 在数列an中,已知a1=-1,(an+1)*an=(an+1)-an(n均为下标),则数列an的通项an= “已知数列{an}中,an>0,Sn是数列{An}中的前n项和,且An+1/An=2Sn”An>0,求An 已知数列{an},a1=1,an+1-an=2^n,求数列{an}通项公式 已知数列｛an}中a1=1,an+1-an=3n,求数列｛an}的通项公式. 已知数列{An}满足A1=1,An+1=2An+2^n.求证数列An/2是等差数列 已知数列{an},a1=2,an+1=an+2n,则数列的通项公式an=? 已知数列｛an}中a1=2,an+1-an=3n,求数列｛an}的通项公式.