1.若数列an满足:a1=1,a(n+1)=2an(n∈N+),则a5=?前8项的和S8=?2.等差数列an的前n项和为Sn,且S3=6,a1=4,则公差d?3.设等比数列an的前n项和为Sn ,若S6/S3=3,则S9/S6=4.已知等比数列an的公比为正数,且a3*a9=2a5^2,a2=1,
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/31 01:48:36
xN@_%a@d DQ4h0|C(jKWm|33V!Kwp/#ƽAcy| bQ'12#]ǐpaDI}KU,H)W9@p4;m"@'%G Xڴj?_A11t)v21&R@]%YUr!'#!ֳ $2L=; i~M0W_I7 ^ș $B)><2hEqNC`^zui
w>_1
nY3B
C]en@
,{}ӥ3k:J$P䝖Y7gUVA4H
:E6Fn}^7+ÅA
已知数列{an}满足a(n+1)=an+n,a1=1,则an=
数列{an}满足a1=2,a(n+1)=2an+n+2,求an
数列an满足a1=1,a(n+1)=an/[(2an)+1],求a2010
已知数列{an}满足a(n+1)=an+lg2,a1=1,求an
数列[An]满足a1=2,a(n+1)=3an-2 求an
若数列an满足a1=1,an+1=2^nan...若数列an满足a1=1,a(n+1)=2^n·an,则数列an的通项公式?
若数列{An}满足A1=2,nA(n+1)-(n+1)An=2,则数列{An}的通项公式A后面的n都是下标
【高考】若数列{an}满足,a1=1,且a(n+1)=an/1+an,证明,数列{1/an}为等差数列,并求出数列{an}的通...【高考】若数列{an}满足,a1=1,且a(n+1)=an/1+an,证明,数列{1/an}为等差数列,并求出数列{an}的通项公式
数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an
已知数列{an}满足a1=1,a(n+1)=2an+1.求证(1)数列a(n+1)是等比数列;(2)求an
若数列{an}满足a1>0,且a(n+1)=(n/n+1)乘以an,则数列{an}是 递增数列,递减数列 常数列 摆动数列求详解
数列{an}满足a1=2,a(n+1)=-1/(an+1),则a2010等于
已知数列{an}满足a1=1,3a(n+1)+an-7
数列{an}满足a1=3,a n+1=2an,则a4等于
已知数列an满足a1=1,a(n+1)=an/(3an+1) 求数列通项公式
数列{an)满足an=4a(n-1)+3,a1=0,求数列{an}的通项公式
根据下列条件,确定数列{An}的通项公式 1.,A1=1,An+1=(n+1)An,求An2已知数列{an}满足a(n+1)=an+n且a1=2,求an
数列{an}满足a1=1,an=a(n-1)+1/(n2-n),求数列的通项公式