数列{an}中,a1=-60,an+1=an+3,若数列{bn}满足bn=|an|,求数列{bn}前30项和
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中,a1=3,an=(3an-1-2)/an-1,数列bn满足bn=an-2/1-an,证明bn是等比数列 2.
数列an满足an+1=2an-1且a1=3,bn=an-1/anan+1,数列bn前n项和为Sn.求数列an通项an,
数列an,bn满足a1=b1=1,an+1-an=bn+1/bn=2,则数列ban的前10项和为
设数列an前n项和为Sn,且an+Sn=1,求an的通项公式 若数列bn满足b1=1且bn+1=bn+an,求数列bn通
数列an的前n项和为Sn,Sn=4an-3,①证明an是等比数列②数列bn满足b1=2,bn+1=an+bn.求数列bn
已知正项等比数列{an}中,a1=3,a3=243,若数列{bn}满足bn=log3an,求数列{1/bnbn+1}的前
已知数列an满足bn=an-3n,且bn为等比数列,求an前n项和Sn
已知数列{an}、{bn}满足:a1=1/4,an+bn=1,bn+1=bn/1-an^2.求{bn}通项公式
(2)若数列{bn}满足bn=an log2 an+1,求数列{bn}的前n项和Tn
数列an中a1=2 an+1=an+2n①求an的通项公式②若an+3n -2=2/bn,求数列bn的前n项和sn
已知数列{an}、{bn}满足:a1=1/4,an+bn=1,bn+1=bn/1-an^2 (1)求{an}的通项公式