数列{bn}=1/An²,An=2n+1,求bn的前N项和,麻烦具体一些
设bn=(an+1/an)^2求数列bn的前n项和Tn
已知数列{an},an=2n+1,数列{bn},bn=1/2^n.求数列{an/bn}的前n项和
an=3*2^(n-1),设bn=n/an求数列bn的前n项和Tn
等差数列{an},{bn}的前n项和分别为An,Bn,切An/Bn=2n/3n+1,求lim(n→∞)an/bn
已知bn=tan an*tan an+1,an=n+1,求数列bn前n项的和
an=2*3^n-1 若数列bn满足bn=an+(-1)^n*ln(an),求数列bn前n项和Sn
数列an的前n项和为Sn,Sn=2an-1,数列bn满足b1=2,bn+1=an+bn.求数列bn的前n项和Tn
已知等差数列an=2n-1,若数列bn=an+q^an,求数列{bn}的前n项和Sn,求详解
数列{an},a1=1,an=2-2Sn,求an,若bn=n*an,求{bn}的前n项和Tn
数列{an}=2n+1,使bn=1/an^2-1,求bn前n项和,
已知数列{an},前n项和Sn=2n-n^2,an=log5^bn,其中bn>0,求数列{bn}的前n项和
(2)若数列{bn}满足bn=an log2 an+1,求数列{bn}的前n项和Tn