已知等差数列{an}的前n项和为Sn,若直线y=kx+1恒过定点(a2005,a2006)则S2010=___?

已知等差数列{an}的前n项和为Sn,若直线y=kx+1恒过定点(a2005,a2006)则S2010=___? 已知数列an的通向公式an=n∧2cosnπ,sn为它前n项的和,则s2010/2010= 设数列an的通项公式an=-1的n-1次方再乘n,前n项和为sn,则s2010= 已知等差数列{an}、{bn}的前n项和分别为Sn、Tn,若Sn/Tn=【7n+1】/【4n+27】,则an/bn= 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? 设{an}为公比q>1的等比数列,若a2004和a2005是方程4x²-8x+3=0的两根,则a2006+a2 已知等差数列{an}的前n项和为Sn,如果Sn=(an+1/2)^2(n∈N+0,bn=(-1)^n*Sn 已知等差数列an中a1=2,其前n项和sn,若数列｛Sn/n｝构成一个公差为2的等差数列,则a3=? 已知等差数列{an}的前n项和为Sn,且(2n-1)Sn+1 -(2n+1)Sn=4n²-1(n∈N*) 等差数列{An}的前n项和为Sn,若 lim Sn/n方 =2 已知等差数列{an}的前n项和为Sn若Sn=Sm(n不等于m)则Sn+m=? 已知数列{an}的前n项和为Sn,且满足an+2Sn*Sn-1=0,a1=1/2.求证：{1/Sn}是等差数列