若数列{an}满足a1=1,a2=1,an=a(n-1 )+a(n-2)(n>=3),试分析13是否为该数列的一项.若是
设数列{an}满足a1+3 a2+3^2 a3+……+3^n-1 an=n/3,a属于N* 求数列{an}的通项
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);
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
数列{an}满足a1=33,a(n+1)-an=2n,则an/n的最小值为_
已知数列{an}满足a1=1,a2=3,a(n+2)=3a(n+1)-2an
数列an满足a1=2,a2=5,a(n+2)=3a(n+1)-2an
整数数列{An}满足 A1*A2+A2*A3+…+A(n-1)*An=(n-1)*n*(n+1)/3 ,(n=2,3,…
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}满足条件:a1=5,an=a1+a2+...a(n-1) n大于等于2,求数列{an}的通项公式
数列an中,a1=1,a2=2数列bn满足an+1+(-1)n次an,a属于N* (1)若an等差数列...
设数列{An}满足A1+3A2+3^2*A3+...+3^(n-1)*An=n/3,a属于正整数.