已知数列{an}满足a1=1,a2=3,a(n+2)=3a(n+1)-2an

已知数列{an}满足a1=1;an=a1+2a2+3a3+...+(n-1)a(n-1); 已知数列{an}满足a1=1,a2=3,a(n+2)=3a(n+1)-2an 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=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}中满足a1=1,a(n+1)=2an+1 (n∈N*),证明a1/a2+a2/a3+…+an/a(n+1 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=a1+2a2+3a3+4a4+.(n-1)a(n-1),求通项an 设数列{an}满足a1+3a2+3^2a3+.3^n-1×an=n/3,a∈N+. 已知数列{an}满足a1=1;an=a1+2a2+3a3+...+(n-1)a(n-1)（n≥2);求通项公式 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an满足a1=2,a2=5,a(n+2)=3a(n+1)-2an 已知数列{An}满足A1=1,A2=3,A(n+2)=3A(n+1)-2An,求an的通项公式