高中数学有关数列、极限的题:设等差数列{an}的公差d=2,前n项的和为sn,则lim(an^-n^0/sn=
高中数学有关数列、极限的题:设等差数列{an}的公差d=2,前n项的和为sn,则lim(an^-n^0/sn=
设等差数列an的公差d为2,前n项和为Sn,则lim(an^2-n^2)/Sn=?
设等差数列的公差d为2,前n项和为Sn,则lim(n→∞)(an^2-n^2)/Sn
设Sn为等差数列{an}的前n项和,若a1=1,公差d=2,Sn+2-Sn=36,则n=( )
设数列an的前n项和为Sn,a1=1,an=(Sn/n)+2(n-1)(n∈N*) 求证:数列an为等差数列,
设等差数列an的公差为d不等于0,前n项和为Sn.则Sn为递增数列的充分必要条件是
等差数列{An}的前n项和为Sn,若 lim Sn/n方 =2
数学等差数列题设各项均为正数的数列{an}的前n项和为Sn.已知2×a2=a1+a3,数列{√Sn}是公差为d的等差数列
设公差为d的等差数列{an}的前n项和为Sn,若a1=1,-2/17
已知公差不为0的等差数列{An}的首项A1=1,前n项和为Sn,若数列{Sn/An}是等差数列,求An?
记数列{an}的前n项和为Sn,若{Sn/an}是公差为d的等差数列,则{an}为等差数列的充要条件是d=?
设等差数列{an}的前n项和为Sn 已知S3=S12 则当公差d