若数列{an}满足a1+3a2+32a3+…+3n-1an=n+13(n∈N*),则an=___.
若数列{an}满足a1+3a2+32a3+…+3n-1an=n+13(n∈N*),则an=___.
数列{an}满足:1/a1+2/a2+3/a3+…+n/an=2n
若数列{an}满足a1+2a2+3a3+~~+nan=n(n+1)(2n+1),则an=
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
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),则a1+a2+a3+…+an=多少?
设数列{an}满足a1+3a2+3^2a3+.3^n-1×an=n/3,a∈N+.
设数列{an}满足a1+2a2+3a3+.+nan=n(n+1)(n+2)
1.数列{an}满足a1+a2+……+an=[4-(-2)^n]/3,n∈N*,则1/a1+1/a3+1/a5+……1/
设数列{an}满足a1+3a2+3²a3+...+3^(n-1)an=n/3,n∈N+*.(1)求数列{an}
设数列an满足a1+3a2+3^2a3+.+3^n-1an=n/3,n∈N*,求数列an的通项公式
数列an满足n ∈ N*,an > 0 且a1^3 + a2^3 + a3^3 + ...+ an^3 = (a1 +