an-an-1=2(n-1)
an-an-1=2(n-1)
数列{an}满足a1=1 an+1=2n+1an/an+2n
数列{an},a1=1,an+1=2an-n^2+3n,求{an}.
An=1/(n+1)+1/(n+2)+.+1/2n,则An+1-An等于?
已知数列{an}满足an+1=2an+n+1(n∈N*).
在数列{an}中,a1=1,a2=5,an+2=an+1-an (n∈N*),则a100等于( an+2=an+1-an
a1=1/2,an+1=an/an+2,求n/an的sn
设数列{an}中,a1=2,an+1=an+n+1,则通项an=?
数列{an},a1=2,an+1(下标)=an下标+n+1 求通项an下标
数列{an}中,a1=35,an+1-an=2n-1,求an
数列{an}满足a1=1,且an=an-1+3n-2,求an
已知数列{An},An+1=2(n+1)+An,求数列An通向