已知数列a1=2,an+1=an+[1/n(n+2)]
在数列{an}中,已知(a1+a2+…+an)/n=(2n-1)an
已知数列{an}满足an+1=2an+3.5^n,a1=6.求an
已知数列{an}中,a1=1,满足an+1=an+2n,n属于N*,则an等于
已知数列满足:A1=1.AN+1=1/2AN+N,N奇数,AN-2N.N偶数
已知数列{An}满足A1=0.5,A1+A2+…+An=n^2An(n∈N*),试用数学归纳法证明:An=1/n(n+1
一道【数列】解答题已知数列{an}满足an/an-1=(n+1)/(n-1),(n∈N*,n>1),a1=2注意:an-
已知数列{an}中a1=6,且an-an-1=(an-1/n)+n+1(n属于N*,n≥2),求an
已知数列{an}满足an=2an-1+2n+2,a1=2
已知数列{AN}满足A1=1,AN+1=2AN+2的N次方.
已知数列an满足an=1+2+...+n,且1/a1+1/a2+...+1/an
已知数列{an}满足a1=1/2,sn=n^2an,求通项an
已知数列{an},an=2^n,则1/a1+1/a2+...+1/an等于多少?