【急!】设{an}是由非负整数组成的数列,满足a1+0,a2=3,(an+1)( an )=(an-1)( an-2+2

【急!】设{an}是由非负整数组成的数列,满足a1+0,a2=3,(an+1)( an )=(an-1)( an-2+2 已知{an}是由非负整数组成的数列,满足a1=0 a2=3 an+1an=(an+1+2)(an-2+2) n≥3 求a 已知an的绝对值是非负整数组成的数列,满足a1=0,a2=3,an+1*an=(an-1 +2）*（an-2 +2),n 数列{an}满足 a1=2,a2=5,an+2=3an+1-2an.(1)求证:数列{an+1-an}是等比数列; (2 看不懂的数列解答题an非负整数数列 a1=0 a2=3 An=An_2+2 求an 通项公式 已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an 一直数列{An}满足A1=1/2,A1+A2+…+An=n^2An 关于数列极限的已知数列an满足a1=0 a2=1 an=(an-1+an-2)/2 求lim(n->无穷）an 设数列an满足a1=a2=1,a3=2,且对正整数n都有an·an+1·an+2·an+3=an+an+1+an+2+a 数列an满足a1=3/2,a(n+1)=an^2-an+1则m=1/a1+1/a2````1/a2009整数部分是 设数列an满足a1=2 an+1-an=3-2^2n-1 设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an