已知数列｛an｝满足a1=3,an＋1=an＋p×3^n（n∈N＊,p为常数）a1,a2＋6,a3成等差数列

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. 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 已知数列an满足a1+2a2+3a3+...+nan=n(n+1)(n+p)(p为常数）其中前10项的和为175,求第1 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=a1+2a2+3a3+...+(n-1)a(n-1); 数列{an}满足：1/a1+2/a2+3/a3+…+n/an=2n 数列an满足a1+2a2+3a3+...+nan=(n+1)(n+2) 求通项an 已知数列(an)满足a1+2a2+3a3+...+nan=n(n+1)(n+2)求an 已知数列{an}满足a1=1,an=a1+1/2a2+1/3a3+...+1/n-1an-1(n>1)求数列{an}的通 数列an满足n ∈ N*,an > 0 且a1^3 + a2^3 + a3^3 + ...+ an^3 = (a1 + 已知数列an满足：a1+a2+a3+...+an=n-an,(n=1,2,3,...)第一问：求a1,a2,a3的值.第 设数列{an}满足a1+3a2+3²a3+...+3^(n-1)an=n/3,n∈N+*.（1）求数列{an}