若数列{an}满足a1+3a2+3^2a3+……+3^(n-1)an=(n+1)/3,则求an
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 00:16:32
![若数列{an}满足a1+3a2+3^2a3+……+3^(n-1)an=(n+1)/3,则求an](/uploads/image/z/1071939-3-9.jpg?t=%E8%8B%A5%E6%95%B0%E5%88%97%7Ban%7D%E6%BB%A1%E8%B6%B3a1%2B3a2%2B3%5E2a3%2B%E2%80%A6%E2%80%A6%2B3%5E%28n-1%29an%3D%28n%2B1%29%2F3%2C%E5%88%99%E6%B1%82an)
x){ѽ
O;W'>۽Ŷ͉ƉFqFڏkgmoc泍My6IET0EΆZ!J~F`yP0`f\FNPB 1
若数列{an}满足a1+3a2+3^2a3+……+3^(n-1)an=(n+1)/3,则求an
若数列{an}满足a1+3a2+3^2a3+……+3^(n-1)an=(n+1)/3,则求an
若数列{an}满足a1+3a2+3^2a3+……+3^(n-1)an=(n+1)/3,则求an
a1+3a2+3^2a3+……+3^(n-1)an=(n+1)/3
a1+3a2+3^2a3+……+3^(n-2)a(n-1)=n/3
3^(n-1)an=1/3
an=1/3^n(n>1),a1=2/3
已知数列{an}的前n项和为Sn 1若数列{an}是等比数列,满足2a1+a3=3a2.a3+2是a已知数列{an}的前n项和为Sn1若数列{an}是等比数列,满足2a1+a3=3a2.a3+2是a2.a4的等差中项,求数列{an}的通向公式
(1)数列{an}中,a1=1,a2=-3,a(n+1)=an+a(n+2),则a2005=____(2)已知数列{an}满足a1=1,a1×a2×a3…an=n^2,求an.
已知数列{an}满足a1=1,a2=3,a(n+2)=a(n+1)-an,求S2012
已知数列{an}满足a1=1,an=a1+1/2a2+1/3a3+…+1/(n-1)a(n-1),若an=2006,则n=___为什么a1=a2=1先求通项公式
若数列an满足,a1+a2+a3+.+an=3n-2求 an的通项公式
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}是否为等差数列?
已知两个等比数列{an},{bn},满足a1=a(a>0),b1-a1=1,b2-a2=2,b3-a3=3,若数列{an}唯一,求若数列{an}唯一,求a的值
数列an满足a1=2,a2=5,a(n+2)=3a(n+1)-2an,求数列{an}的通项公式
已知数列{an}满足:a1=1,an=a1+2a2+3a3+``````+(n-1)a(n-1)(n大于等于2),则通项公式an是什么?
已知数列{an}满足a1=4/3,2-a(n+1)=12/an+6则1/a1+2/a2+.1/an=?
已知数列an满足a1=1,an=a1+2a2+3a3+4a4+.(n-1)a(n-1),求通项an
数列{An}满足A1+3A2+3^2*A3+.+3^N-1*An=n/3 A属于N紧急求数列{An}的通项
若数列{an}满足:a1=1,an+1=2an,n=1,2,3….则a1+a2+…+an=______.
若数列{an}满足a1=1,an+1=2an,n=1,2,3,……,则a1+a2+……+an=____________
设数列AN满足A1等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式
数列{an}满足a1=a,an+1=1+1/an.若3/2
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,a2=3,an+2=3an+1-2an求an