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 设数列{an}中,a1=2,a(n+1)=an+n+1,求an 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 数列an中 a1=1 a(n+1)=2an\(an+2) 求数列通项公式an 设数列{an}中,a1=2,an+1=an+n+1,则通项an=? 在数列an中,a1=2 an+1=an+3n则an= 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列an中,a1=2,an+1=an+lg(n/n+1)求an 数列{an}中,a1=1,an=2根号an-1(n>1),求{an}的通项公式 在数列{an}中已知a1=1，an+1=an+2n-1，求an． 已知数列{An}中,A1=1,A(n+1)=An/(1+2An),求An