数列{an},a1=3,an*a(n+1)=(1/2)^n,求an
数列{an},a1=1,an+1=2an-n^2+3n,求{an}.
设数列{an}中,a1=2,a(n+1)=an+n+1,求an
数列{an}满足a1=1,且an=an-1+3n-2,求an
数列A(n+1)=2An+2n-3,A1=2,求An
数列{An},A1=1,A(n+1)=3An+4.求An和Sn.
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
已知数列{an}满足a1=1,a(n+1)=3an+2(n属于N) 1.求证数列{an+1}是等比数列 2.求{an}的
已知数列{an}满足a(n+1)=an+3n+2,且a1=2,求an=?
.感激= 已知数列{an}中,a1=3,an=(2^n)*a(n-1) (n》2,n∈N*)求数列an通项公式
数列an,a1=1,a(n+1)=an+2n+3,求an用累加法
在数列an中,a1=1,且满足a(n+1)=3an +2n,求an
已知数列an满足a(n+1)=an+3n+2,且a1=2,求an