已知数列{an}满足a1=1/4,an=[a(n-1)]/[3a(n-1)+1] (n∈N,n≥2),求数列{1/an}
已知数列{an}满足a1=33,a(n+1)-an=2n,求an/n的最小值
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
.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
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a(n+1)=an+3n+2,且a1=2,求an
已知数列{an}满足a1=1,an=4a(n-1)/[2a(n-1)+1] (n>=2)求数列{an}的通项公式
已知数列{an}满足a1=1,an=a1 +1/2a2 +1/3a3 … +1/(n-1)a(n-1),(n>1,n∈N
已知数列{an}满足,a1=2,a(n+1)=3根号an,求通项an
已知数列An满足A1=1,An=3^(n-1)+A(n-1)(n=>2).(1)求A2,A3;(2)证明An(3^n-1
已知数列{an}{bn}满足a1=1,a2=3,b(n+1)/bn=2,bn=a(n+1)-an,(n∈正整数),求数列
数列题已知数列中, A1=2,An=2A(n-1)+3(n ≥ 2,n∈ N),求An
已知数列{an}满足a1=1,2a(n+1)an+3a(n+1)+an+2=0.