a(n+1)=2an/3an+4,a1=1/4,求an

a(n+1)=2an/3an+4,a1=1/4,求an 在数列｛an｝中,a1=2,an+1=4an-3n+1,n属于正整数 (1)证明｛an-n｝是等比数列 (2)求数列｛a 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 数列an,a1=4,an+1=5^n*an,求an 设数列{an}中,a1=2,a(n+1)=an+n+1,求an 已知数列{an}中,a1=-1,a2=4,an+2+2an=3an+1 求证：数列{an+1-an}是等比数列,并求{a 数列a1=2,a（n+1）=4an-3n+1,求{an}通项公式 数列A1=1/3,An+1=An+An²/n²求证An>1/2+1/4n 数列{An},A1=1,A(n+1)=3An+4.求An和Sn. 数列A(n+1)=2An+2n-3,A1=2,求An 在数列{an}中,a1=2,an+1=4an-3n+1