a1=1/2 an+1=an+1/4n^2-1 则该数列的通项公式是

数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an an=a1+(n-1)d 和Sn=n(a1+an)/2中an是什么意思? an=a1+(n-1)d 和Sn=n(a1+an)/2中an是什么 数列{an}满足a1=1 an+1=2n+1an/an+2n 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 数列{an}中,a1=1,an+1/an=n/n+2,求an 一道数学题、、数列{an}：a1=4,an=3an-1+2n-1,n≥2求an. a1=1,Sn=n^2an,求an 数列a1=-1,an+1=2an+4*{3}^{n-1}a1=-1,an+1=2an+4*{3}^{n-1},求an a(n+1)=2an/3an+4,a1=1/4,求an 数列｛an｝,a1=2,4a(n+1)-an=2,求通项an a1=2,an+1=2/3an+n-4 求an an+1 ,n+1是下表 ,an+1=an^3 a1=2 ,求an 设数列{an}中,a1=2,an+1=an+n+1,则通项an=? a1=1/2,an+1=an/an+2,求n/an的sn 数列an集合中,a1=2,an+1=an+(2n+1),求an. 数列{an}中,a1=35,an+1-an=2n-1,求an 已知数列an,a1=1 an+1-an=2的n次幂求an