数列AN满足a1+a2+L+an=2n^2-3n+1则a4+a5+L+a10=__________
数列AN满足a1+a2+L+an=2n^2-3n+1则a4+a5+L+a10=__________
已经数列{an}.a1+a2+a3+…+an=2n^2-3n+1.求a4+a5+…+a10
已知数列(an)满足a1=1,an+1=2an/an+2(n∈N*) 求a2,a3,a4,a5 猜想数列(an)的通项公
已知数列{an}满足a1*a2*a3···a(n-1)*an=n^2,则a10-a4=
已知数列{an}满足a1+a2+a3+...+an=n^2+2n.(1)求a1,a2,a3,a4
1.数列{an}满足a1+a2+……+an=[4-(-2)^n]/3,n∈N*,则1/a1+1/a3+1/a5+……1/
已知数列{an}中,a1=2,a2=1,a(n+2)=3a(n+1)-an,则a6+a4-3a5的值为
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
数列{an}的前n项和为sn=n2+3n+1,则a1+a2+a3+a4+a5
已知数列{an}的前n项和为Sn 若2(Sn+1)=3an则(a2+a5)/(a1+a4)=?
已知数列an满足a1=1,an=a1+2a2+3a3+4a4+.(n-1)a(n-1),求通项an
已知数列an为等差数列,an=n,则a1*a2-a2*a3+a3*a4-a4*a5+...-a100*a101=