1.已知数列满足{an}满足 a1=3,a(n+1)-an=2,试写出这个数列的前4项.2.已知数列{an}的通向公式为an=n^2-6n+4,当n为何值时,an取最小值,最小值是多少?

已知数列{an}满足a1=1 an+1=an/(3an+1) 则球an 已知数列an满足a1=1,a2=3,an+1.an-1=an,求a2013 已知数列（an）满足a1=1.an+1=3an+2n-1,求an 已知数列{an}满足3an+1+an=4,a1=9,求通项公式. 已知数列{an}满足a1=1/2,an+1=3an+1,求数列{an}通项公式 已知数列{an}满足a1=1,3a(n+1)+an-7 已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列 已知数列an满足a1=1,a(n+1)=an/(3an+1) 求数列通项公式 已知数列{an}满足:a1=3,an=Sn-1+2n,求数列an及sn 已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an 已知数列an满足a1=0,an+1=an-根号3/根号3an+1,则a2012= 已知数列｛an｝满足a1=4/3,且an+1=4（n+1）an/3an+n 已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=? 已知数列an满足a1=1,an+1=3an+1,证明｛an+½｝是等比数列 已知数列{an}满足a1=1 ,an+1=3an+2的n+1次幂,求an 已知数列{an}满足a1=4,3an=5an(n下-1) +1,求an 已知数列（an）满足an+1=2an+3×2∧n,a1=2求an 已知数列{an}满足an+1=an+n,a1等于1,则an=?