已知数列{an}满足a1=1,a2=2,an+2=an+1+2an,写出此数列的前六项
已知数列{an}满足a1=1,a2=2,an+2=an+1+2an,写出此数列的前六项
已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an
已知数列an满足an=1+2+...+n,且1/a1+1/a2+...+1/an
关于数列极限的已知数列an满足a1=0 a2=1 an=(an-1+an-2)/2 求lim(n->无穷)an
已知数列{an}满足:a1=1,且an-an-1=2n,求(1)a2,a3,a4.(2)求数列{an}的通项an
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+.+an=n^2,求数列{an}的通项an.
若数列{An}满足An+1=An^2,则称数列{An}为“平方递推数列”,已知数列{an}中,a1=9,点(an,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
一直数列{An}满足A1=1/2,A1+A2+…+An=n^2An
已知数列{an}满足a1=1,a2=-13,an+2-2an+1+an=2n-6
已知数列{an}满足a1=1,a2=-13,an+2-2an+1+an=2n-6