已知｛an｝满足a1=3,an+1=2an+1,(1)求证{an +1}是等比数列；（2）求这个数列的通项公式.

已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=? 已知{an}满足a1=1.an=3*n+2An-1,求an 已知{an}满足a1=1,a(n+1)=2an+2,求an 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=1/2,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,a2=3,an+2=3an+1-2an求an 已知数列｛an｝满足a(n+1)=an+3n+2,且a1=2,求an=? 已知{an}满足a1=3,a（n+1）=2an+1求（ an +1）是等比数列 已知数列{an}满足3a(n+1)=2an-4,且a1=1/5,求an 已知等差数列{an}满足a(n+1)=an+3n+2,且a1=2,求an.雪地跪拜! 已知数列an满足a(n+1)=an+3n+2,且a1=2,求an 已知数列an满足条件a1=-2 a（n+1）=2an/(1-an) 则an= 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 数列{an}满足a1=a,an+1=1+1/an.若3/2 数列[An]满足a1=2,a（n+1）=3an-2 求an 已知数列{an}满足,a1=2,a(n+1)=3根号an,求通项an数列{an}满足:an>0,且根号下Sn=an+1/4,求通项an 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 ,an+1=3an+2的n+1次幂,求an