若数列an满足a=(a1+a2+a3+...+an)/n (n为正整数,a为常数),则an=____
设数列{an}满足:a1+a2/2+a3/3+a4/4……+an/n=An+B,其中A、B为常数.数列{an}是否为等差
已知数列{an}满足a1=4,an+1=an+p.3^n+1(n属于N+,P为常数),a1,a2+6,a3成等差数列.
数列{an}满足an=2an-1+2^n+1(n为正整数,n≥2),a3=27 (1)求a1,a2的值
设数列{An}满足A1+3A2+3^2*A3+...+3^(n-1)*An=n/3,a属于正整数.
数列{an}中,a1*a2*a3...*an=n^2(n属于正整数),则a3+a5的值为
已知数列{an}满足a1=4,a(n+1)=an+(k*3^n)+1(n∈N*,k为常数),a1,a2+6,a3成等差数
数列{an}满足a1+2a2+2^2a3+.+2^n-1an=n/2(n属于正整数),
设数列{an}的前n项和为Sn,并且满足2Sn=an²+n,an>0.(1)求a1,a2,a3.(2)猜想{a
通项公式为an=an^2+n的数列,若满足a1<a2<a3<a4<a5,且an>a(n+1)对n≥8恒成立,则实数a的取
给定数列an={a1,a2,a3.an},bn=a(n+1)-an
已知数列{an}满足:a1=1,且an-a(n-1)=2n.求a2,a3,a4.求数列{an}通项an
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