已知数列{an}的前n项和Sn=n2(n∈N*),数列{bn}为等比数列,且满足b1=a1,2b3=b4(1)求数列{an},{bn}的通项公式;(2)求数列{anbn}的前n项和..(1)由已知Sn=
https://www.ouer.net/zati/k7dd.html - 2022-07-30 14:20:02 - 中学考试杂题类比{an}为等差数列,则有bn=(a1+a2+a3+…+an)/n为等差数列,若{cn}为等比数列,则dn=?
https://www.ouer.net/chuzhongshuxue/dcbx.html - 2022-08-13 02:44:00 - 中学数学试题在数列{an}和{bn}是两个无穷等差数列,公差分别为d1和d2,求证:数列{an+bn}是等差数列,并求它的公差..an+bn-(an-1+bn-1)=(an-an-1)+(bn-bn-1)=d1+d2
https://www.ouer.net/chuzhongshuxue/uax3.html - 2022-10-17 19:14:55 - 中学数学试题等比数列{an}中,an大于0,n属于正整数,求证{lgan}是等差数列,{根号下an}是等比数列.解析:∵{an}是等比数列,令首项=a1,公比=q∴an=a1*q^(n-1),an>0,n∈N+∵log
https://www.ouer.net/chuzhongshuxue/vw0f.html - 2022-10-28 22:02:53 - 中学数学试题数列3,6,9,12,…300,303是一个等差数列.这个等差数列中所有数的和是多少?这个等差数列中的所有数相乘,所得乘积末尾有多少个零?.
https://www.ouer.net/zati/fse.html - 2022-01-29 19:09:13 - 中学考试杂题等差数列等比数列的一些常用公式.
https://www.ouer.net/shuxue/4cuu.html - 2020-10-13 20:22:41 - 数学作业答案只有等差数列或等比数列才有通项公式吗.
https://www.ouer.net/shuxue/nfn13.html - 2020-12-04 07:24:14 - 数学作业答案已知数列an中,a1=2,An+1=an平方加2an 1,证明数列【lg(1+an)】是等比已知数列an中,a1=2,An+1=an平方加2an1,证明数列【lg(1+an)】是等比数列,求an的通项公式
https://www.ouer.net/chuzhongshuxue/vfdu.html - 2022-10-27 04:28:50 - 中学数学试题已知a>0,a≠1,数列{an}是首项为a,公比也为a的等比数列,令bn=anlgan(n∈N*)(Ⅰ)求数列{bn}的前n项和Sn;(Ⅱ)当数列{bn}中的每一项总小于它后面的项时,求a的取值范围..
https://www.ouer.net/zati/wn9.html - 2022-02-06 06:59:05 - 中学考试杂题已知a>0,a≠1,数列{an}是首项为a,公比也为a的等比数列,令bn=anlgan(n∈N*)(Ⅰ)求数列{bn}的前n项和Sn;(Ⅱ)当数列{bn}中的每一项总小于它后面的项时,求a的取值范围..
https://www.ouer.net/chuzhongshuxue/fmb5.html - 2022-09-25 07:52:28 - 中学数学试题已知数列an的前n项和为Sn=33n-n^2.用定义证明:(1)数列an为等差数列(2)数列的前多少项和最大?.
https://www.ouer.net/chuzhongshuxue/fec4.html - 2022-09-25 01:49:28 - 中学数学试题已知数列{㏒2xn}是公差为1的等差数列,数列{xn}的前100项的和等于100,求数列{xn}的前200项的和.设bn=㏒2xn,则bn=b1+(n-1),=> xn=2^bn=2^[b1+(n-1)
https://www.ouer.net/chuzhongshuxue/dcfm.html - 2022-08-13 04:24:59 - 中学数学试题关于判断等比数列在数列an中 a2除以a1=2 a3除以a2=2 为什么它不能确定是等比数列而an an+1除以an=q 就是等比数列啊.在数列an中 a2除以a1=2 a3除以a2=2,只能说明前三项成等比数列
https://www.ouer.net/chuzhongshuxue/0snb.html - 2022-11-19 17:24:44 - 中学数学试题数列极限与函数单调性的问题今天看书发现一个问题.数列利用函数求极限,函数单调增,数列单调,函数单调减,数列不单调.这是为什么呢?
https://www.ouer.net/chuzhongshuxue/wv1v.html - 2022-11-05 12:29:46 - 中学数学试题数列2,1,5,11,111,数列公式.an=a(n-1)*a(n-2)*2+1后一项等于本项与前一项的积乘以2再加1
https://www.ouer.net/chuzhongshuxue/ucxx.html - 2022-10-20 00:17:01 - 中学数学试题在等差数列2,5,8…中,每相邻两项之间插入三个数使其构成等差数列,这样得到一新数列,问;(1)原数...在等差数列2,5,8…中,每相邻两项之间插入三个数使其构成等差数列,这样得到一新数列,问;(1)
https://www.ouer.net/chuzhongshuxue/rd90.html - 2022-10-04 13:09:48 - 中学数学试题在数列{an}中,a1=1,且a(n+1)=Sn(n∈N*).数列{bn}是等差数列,其公差d>0,b1=1,且b3,b7+2,3b9成等差数列求数列{an}和{bn}的通项公式.一.a(n+1)=Sn
https://www.ouer.net/chuzhongshuxue/r7ke.html - 2022-10-08 23:05:06 - 中学数学试题已知数列{bn},b1=1,b(n+1)=2bn+1,求证数列{bn}为等比数列..是证{b(n)+2}为等比数列吧?
https://www.ouer.net/chuzhongshuxue/wrdx.html - 2022-11-04 14:20:59 - 中学数学试题已知数列{an}的前n项和为sn=a^n-2(a是不为0的实数),那么数列{an}是等比还是等差数列?.
https://www.ouer.net/chuzhongshuxue/fmc8.html - 2022-09-25 08:20:37 - 中学数学试题数列{an}首项a1=1,前n项和Sn与an之间满足an=2Sn22Sn−1(n≥2)(1)求证:数列{1Sn}是等差数列 (2)求数列{an}的通项公式..
https://www.ouer.net/shuxue/nzkv2.html - 2021-06-26 22:20:52 - 数学作业答案数列{an}首项a1=1,前n项和Sn与an之间满足an=2Sn22Sn−1(n≥2)(1)求证:数列{1Sn}是等差数列 (2)求数列{an}的通项公式..
https://www.ouer.net/shuxue/nzwkf.html - 2021-06-28 02:14:10 - 数学作业答案在数列{an}中,a1=1,2a(n+1)=(1+1/n)^2*an,(1)证明数列{an/n^2}是等比数列,并求{an}的通项公式(2)令bn=a(n+1)-1/2an,求数列{bn}的前n项和Sn
https://www.ouer.net/chuzhongshuxue/0f77.html - 2022-11-19 03:06:20 - 中学数学试题1 2 6 39 )数列1 2 6 39 )数列求教!.1^1+1=22^2+2=66^2+3=3939^2+4=15251525
https://www.ouer.net/chuzhongshuxue/k3r2.html - 2022-07-21 15:14:03 - 中学数学试题已知数列{an}满足a1=1,an+1-an=2;数列{bn}满足b1=1,bn+1-bn=2n-1.(Ⅰ)求数列an和bn的通项公式;(Ⅱ)求数列{nbn}的前n项和Tn..
https://www.ouer.net/chuzhongshuxue/w8cm.html - 2022-11-08 11:17:14 - 中学数学试题设数列{an}是一等差数列,数列{bn}的前n项和为Sn=23(bn−1),若a2=b1,a5=b2.(1)求数列{an}的通项公式;(2)求数列{bn}的前n项和Sn..(1)∵S1=23(b1−1)
https://www.ouer.net/zati/wnh.html - 2022-02-06 06:02:12 - 中学考试杂题1.已知数列{a_n}是公差不为零的等差数列,数列{a_(k_n)}成等比数列,k_1=1,k_2=3,k_3=13,则k_1+k_2+…+k_n=?
https://www.ouer.net/chuzhongshuxue/ua84.html - 2022-10-17 21:24:55 - 中学数学试题已知数列{an}是等比数列,若a4,a10,a7成等差数列,证明a1,a7,a4也成等差数列.2a10=a4+a7因a10=a7×q³,a4=a1×q³,a7=a4×q³,
https://www.ouer.net/zati/hkcv.html - 2022-05-21 19:24:28 - 中学考试杂题设数列{bn}的前n项和为Sn,且bn=2-2s.数列{an}为等差数列,且a5=14,a7=20.(1)求数列{bn}的通项公式;(2)若cn=an*bn(n=1,2,3),Tn为数列{cn}的前n项和求正
https://www.ouer.net/shuxue/ds88.html - 2021-02-02 09:30:50 - 数学作业答案等差数列公差为3首项增加30还是等差数列首项扩大四倍也是等差数列.概述列为
https://www.ouer.net/chuzhongshuxue/h1sc.html - 2022-06-07 07:53:18 - 中学数学试题数列如何求和?(如1、3、6、10、15作为一个数列.就是公差递增的数列?.
https://www.ouer.net/chuzhongshuxue/caze.html - 2022-09-25 13:25:16 - 中学数学试题求解高中数学数列在无穷等比数列中,当|q|
https://www.ouer.net/chuzhongshuxue/fmr3.html - 2022-09-25 08:32:51 - 中学数学试题已知数列{an}的前n项和Sn=an2+bn+c(a≠0),求数列{an}成等差数列的充要条件..当n=1时,a1=a+b+c;当n≥2时,an=Sn-Sn-1=2an+b-a由于a≠0,∴当n≥2时,
https://www.ouer.net/chuzhongshuxue/wc9z.html - 2022-11-04 12:18:59 - 中学数学试题若数列{an}是公比为q的等比数列,且bn=lgan,求证{bn}为等差数列.设an=a1*q^(n-1),那么bn=lgan=lg(a1*q^(n-1))=lga1+(n-1)lgq,所以b(n+1)
https://www.ouer.net/chuzhongshuxue/refu.html - 2022-10-09 19:12:20 - 中学数学试题如果数列XN为无穷大量,数列YN为极限不为零,求证数列XNYN XN/YN为无穷大量.
https://www.ouer.net/shuxue/1bxh.html - 2021-05-12 14:25:52 - 数学作业答案数列xn,yn发散,证明数列xnyn不一定发散..
https://www.ouer.net/shuxue/nzuhc.html - 2021-01-08 11:48:40 - 数学作业答案公差为0的等差数列是等比数列?.除了全为0的等差,其他是的,比为1
https://www.ouer.net/chuzhongshuxue/1a48.html - 2022-11-24 15:25:56 - 中学数学试题已知等比数列{an}为递增数列,且a52=a10,2(an+an+2)=5an+1,则数列{an}的通项公式为______..设数列的公比为q,首项为a1,则∵a52=a10,2(an+an+2)=5an
https://www.ouer.net/chuzhongshuxue/fmkh.html - 2022-09-25 07:12:37 - 中学数学试题已知数列{an}的前n项和为Sn,且Sn=23an+1(n∈N*);(Ⅰ)求数列{an}的通项公式;(Ⅱ)若数列{n|an|}的前n项和为Tn,求数列{Tn}的通项公式、.(Ⅰ)a1=3,当n≥2时,Sn
https://www.ouer.net/chuzhongshuxue/e70.html - 2022-02-23 05:28:13 - 中学数学试题设{an}与{bn}中一个是收敛数列,另一个是发散数列.证明{an±bn}是发散数列.又问{anbn}和{an/bn}(bn≠0}是否必为发散数列..如果{an+bn}收敛因{an}也收敛对任何e都有N1
https://www.ouer.net/chuzhongshuxue/r91w.html - 2022-10-09 14:54:57 - 中学数学试题一道高二数列题已知数列{an}满足a1=2,an+1=2an/an+2 问:数列1/na是否是等差数列?
https://www.ouer.net/chuzhongshuxue/wnr1.html - 2022-11-02 10:13:41 - 中学数学试题已知数列{以2为底xn的对数}是公差为一的等差数列,数列的前100项的和等于100.求数列{xn}的前200项和..an={以2为底xn的对数} a100=a1+ 99 前100项的和=100*
https://www.ouer.net/chuzhongshuxue/fmue.html - 2022-09-25 09:05:28 - 中学数学试题数列的数学题求等比数列,根号2,2,2根号2,4根号2,此数列前15项的和..
https://www.ouer.net/shuxue/w1xb.html - 2021-05-05 23:39:44 - 数学作业答案有关数列的习题等差数列An ,前三项和12,积48,求首项.等差数列中,前15项和90,求第八项.等差数列中 A2+A4+A5+A6+A8=10,求A3+A13对不起 对不起(3)等差数列中 A2+A4
https://www.ouer.net/chuzhongshuxue/va76.html - 2022-10-25 07:04:53 - 中学数学试题已知数列{an}的通项公式为an=8-3n.[1]说明数列{an}是等差数列,并求出a1和公差d;[2]a判断数列的项随序号变化的趋势,并加以总结.可求:an-a(n-1)为定值3,所以为等差数列且公差为
https://www.ouer.net/chuzhongshuxue/cnfs.html - 2022-09-25 21:04:52 - 中学数学试题在等差数列{an}中,我们有an=am+(n-m)d,类比等差数列,在等比数列{an}中an与am之间的关系为______..在等差数列{an}中,我们有an=am+(n-m)d,类比等差数列,等比数列中也是如此
https://www.ouer.net/chuzhongshuxue/bxkr.html - 2022-09-14 17:06:07 - 中学数学试题如果数列{an}的前n项和为Sn=(2的n次方分之1)乘以(3的n次方-2的n次方)那么这个数列A是等差数列而不是等比数列 B是等比数列而不是等差数列 C既是等差数列又是等比数列 D既不是等差数列又不是等比数列
https://www.ouer.net/chuzhongshuxue/0xne.html - 2022-11-20 19:37:08 - 中学数学试题数列{an}中,a1=1,且an+1=Sn(n≥1,n∈N*),数列{bn}是等差数列,其公差d>0,b1=1,且b3、b7+2、3b9成等比数列.(Ⅰ)求数列{an}、{bn}的通项公式;(Ⅱ)设数列
https://www.ouer.net/chuzhongshuxue/uc27.html - 2022-10-20 01:04:38 - 中学数学试题已知数列{an}的各项均为正数,前n项和为Sn,且满足2Sn=an2+n-4(n∈N*).(1)求证:数列{an}为等差数列;(2)求数列{an}的通项公式..(1)∵2Sn=an2+n-4(n∈N*)
https://www.ouer.net/chuzhongshuxue/rnhc.html - 2022-10-03 05:00:32 - 中学数学试题令数列B=1/n*n,证明该数列前n项和小于2.1/n^n
https://www.ouer.net/chuzhongshuxue/ebz.html - 2022-02-22 08:46:05 - 中学数学试题已知等比数列A An=2*(3的n-1次方),则由此数列的偶数项所组成的新数列前n项和是?.
https://www.ouer.net/chuzhongshuxue/xuz8.html - 2022-11-12 12:32:50 - 中学数学试题