把多项式an+4-an+1分解得?A.an(a4-a) B.an-1(a3-1) C.an+1(a+1)(a2-a+1)
把多项式an+4-an+1分解得?A.an(a4-a) B.an-1(a3-1) C.an+1(a+1)(a2-a+1)
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满足a1=1,an=a1+2a2+3a3+4a4+.(n-1)a(n-1),求通项an
数列证明题:设数列{an}满足:A(n)=a1+a2+~+an,B(n)=a2+a3+~+a(n+1),C(n)=a3+
(a1+a2+a3+.+an)^2=a1^2+a2^2+.+an^2+2(a1a2+a2a3+...+a(n-1)an)
已知数列{an}满足a1=1,a(n+1)=2an+1(n∈N*).证明1/a2+1/a3+1/a4+.+1/an+1
已知数列{an}满足A1=0,A(N+1)=AN减去根号三/根号三AN加1.求A2,A3,A4,A5,A6
An=a*An-1+b*An-2+c*An-3+d*An-4 已知了前面几项的值,能不能利用eviews把abcd求出来
1 a a2 a3 …… an怎么因式分解
等比数列an,an大于0,Q不等于1,且a2,1/2a3,a1成等差数列,则(A3+A 4)/(a4+a5)+
等比数列an中,Sn=a1+a2+.+an,已知a3=2s2+1,a4=2s31则公比q是多少?a4-a3为什么等于2a