设数列{an}的前n项和为Sn,且Sn=2^n-1.
设数列{an}的前n项和为Sn,且Sn=2^n-1.
设数列{an}的前n项和为Sn,且Sn=2^n-1.求数列{an}的通项公式!
设数列{an}的前n项和为Sn,且对任意正整数n,an+Sn=4096
设数列{an}的前n项和为Sn,且对任意正整数n,an+Sn=4096.
设数列{an}前n项和为Sn,数列{Sn}的前n项和为Tn,满足Tn=2Sn-n2,n∈N*.
已知数列an的首项a1=5,前n项和为Sn,且S(n+1)=2Sn+n+5(n∈N*),求数列{an}的前n项和Sn,设
设数列{an}的前n项和为Sn,且2an=Sn+2n+1(n∈N*).
设数列{an}的前n项和为Sn,已知首项a1=3,且Sn+1+Sn=2an+1,试求此数列的通项公式an及前n项和Sn
设数列an的前n项和为sn,且a1为1 ,Sn+1=4an+2(n∈N正)
设数列{an}的前n项和为Sn,且sn=n*n-4n+4,设Bn=An/2的n次方,则数列{Bn}的前n项和Tn为?
设数列{an}的前n项和为Sn=2an-2n,
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,