已知数列﹛㏒₂﹙An-1﹚﹜(n∈正整数)为等差数列,且a1=3,a3=9,(1)、求数列{An}的通项公式(2)、证明1/(a2-a1)+1/(a3-a2)+……+1/(a( n+1) -
https://www.ouer.net/chuzhongshuxue/vuur.html - 2022-10-28 08:02:52 - 中学数学试题+n),数列an成等差数列的充要条件是bn也是等差数列..bn=(a1+2a2+...+nan)/(1+2+...+n)a1+2a2+...+nan=(1+2+...+n)bn=
https://www.ouer.net/chuzhongshuxue/vwd0.html - 2022-10-28 19:40:39 - 中学数学试题Fibonacci数列是什么?.
https://www.ouer.net/shuxue/dsxer.html - 2022-12-10 23:35:12 - 数学作业答案高中数学数列 求解 急啊!
https://www.ouer.net/chuzhongshuxue/dck5.html - 2022-08-13 00:38:04 - 中学数学试题设数列{an}是一个公差不为零的等差数列,且a1=4,a3=6,是否存在无穷等比数列{a(nk)},n1=1,n2=3,使该数列中每项都是{an}中的项,为什么?..
https://www.ouer.net/zati/va3.html - 2022-02-04 21:51:22 - 中学考试杂题已知各项均为正数的数列{an},对于任意正整数n,点(an,sn)在直线y=1/2(x2+x)上.求证:数列{an}是等差数列..
https://www.ouer.net/shuxue/uu6.html - 2021-03-17 10:10:50 - 数学作业答案在4数列{an}中值已知a1=3,an+1=3n-4n+2(n∈N*) (1)记bn=an-2n,证明数列{bn}为等比数列并求其通项公式 (2)求数列的前n项和Sn.已知Sn是等比数列的前n项和,首项
https://www.ouer.net/chuzhongshuxue/vbhd.html - 2022-10-26 21:26:13 - 中学数学试题以知数列{An}是等比数列,{Sn}是其前n项的和,a1,a7,a4成等差数列.求证:2S3,S6,S12-S6 成等比数列..a7=a1q^6 a4=a1q^3 因为a1,a7,a4成等差数列 所以a7
https://www.ouer.net/zati/hkcu.html - 2022-05-21 19:22:39 - 中学考试杂题已知数列{an}是等比数列,Sn是其前几项的和,a1,a7,a4成等差数列,求证:2S1,S6,S12-S6成等比数列..a7=a1q^6 a4=a1q^3 因为a1,a7,a4成等差数列 所以a7=(
https://www.ouer.net/chuzhongshuxue/brbb.html - 2022-09-13 09:01:19 - 中学数学试题三个数成等比数列,若第二个数加上4就成等差数列,再把这个数列的第三项加32又成等比数列,求这三个数,该.三个数成等比数列,设为:a,aq,aq^2a,aq+4,aq^2成等差数列,得到:2(aq+4)=
https://www.ouer.net/chuzhongshuxue/brf1.html - 2022-09-13 09:18:28 - 中学数学试题pascal给出这样一个数列:1 1 2 3 5 8 13 21 34 55 89...问这个数列的第n项是什么.
https://www.ouer.net/shuxue/4w7x.html - 2021-05-25 13:55:50 - 数学作业答案数列难题组!
https://www.ouer.net/zati/khwk.html - 2022-07-01 12:59:57 - 中学考试杂题已知{an}是各项均为正数的等比数列,求证{根号an}是等比数列..
https://www.ouer.net/chuzhongshuxue/vmes.html - 2022-11-02 01:01:40 - 中学数学试题已知等差数列an中a2=8,S10=185㈠求数列an的通项公式an㈡如果从数列中依次取出第2,4,8…,2n项,按原来...已知等差数列an中a2=8,S10=185㈠求数列an的通项公式an㈡如果从数列中依次取出第
https://www.ouer.net/chuzhongshuxue/b175.html - 2022-09-15 10:33:31 - 中学数学试题已知f(x)=(x-1)^2,数列{an}是公差为d的等差数列,{bn}是公比为q的等比数列,设a1=f(d-1)已知f(x)=(x-1)^2,数列{an}是公差为d的等差数列,{bn}是公比为q的等比数列
https://www.ouer.net/chuzhongshuxue/k4br.html - 2022-07-22 19:02:58 - 中学数学试题一道数学数列题,求教育!
https://www.ouer.net/chuzhongshuxue/r2xu.html - 2022-10-07 16:51:02 - 中学数学试题已知{an}是各项均为正数的等比数列,{根号an}是等比数列么?(详细过程).是{an}是各项均为正数的等比数列q大于0{根号an}是以根号a1为首项根号q为公比的等比数列
https://www.ouer.net/chuzhongshuxue/vmeu.html - 2022-11-02 01:02:17 - 中学数学试题数列不等式证明数列{an}中a1=2,a(n+1)=an/2 +1/an,求证:根号2
https://www.ouer.net/chuzhongshuxue/b3ma.html - 2022-09-16 00:21:10 - 中学数学试题设数列{an}和{bn}满足a1=b1=6,a2=b2=4,a3=b3=3 ,且数列{an+1-an}是等差数列,{bn-2}是等比数列(1)求列数{an}和{bn}的通项公=式(2)设{nbn}的前n
https://www.ouer.net/chuzhongshuxue/whud.html - 2022-11-02 23:37:18 - 中学数学试题已知数列{log2(an-1)}n∈N*)为等差数列,且a1=3,a3=9.求数列{an}的通项公式..设等差数列{log2(an-1)}的公差为d.由a1=3,a3=9得2(log22+d)=log22
https://www.ouer.net/chuzhongshuxue/z250.html - 2022-05-03 04:31:16 - 中学数学试题设数列{an}满足:a1+a2/2+a3/3+a4/4……+an/n=An+B,其中A、B为常数.数列{an}是否为等差数列?.
https://www.ouer.net/chuzhongshuxue/cnz2.html - 2022-09-25 19:56:52 - 中学数学试题已知数列{an}的奇数项是公差为d1的等差数列,偶数项是公差为d2的等差数列,Sn是数列{an}的前n项和,a1=1,a2=2.(1)若S5=16,a4=a5,求a10;(2)已知S15=15a8,且对任意
https://www.ouer.net/chuzhongshuxue/ruzn.html - 2022-10-05 22:48:36 - 中学数学试题数列{an}中,a1=1,a2=3 a(n+2)+4a(n+1)-5an=0 n属于N* 求数列的通项公式数列{an}中,a1=1,a2=3 a(n+2)+4a(n+1)-5an=0 n属于N* 求数列的通项公式其中
https://www.ouer.net/chuzhongshuxue/wrk5.html - 2022-11-04 14:09:22 - 中学数学试题已知根号x,[根号f(x)]/2,根号3(x大于等于0)成等差数列.又数列{an}(an>0)中,a1=3,此数列前n项和Sn对所有大于1的正整数n都有Sn=f(S[n-1]),1.求数列{an}的第n
https://www.ouer.net/shuxue/1f3w.html - 2021-05-12 16:57:49 - 数学作业答案等比数列与等差数列之间最大的区别是什么?.
https://www.ouer.net/chuzhongshuxue/u3rb.html - 2022-10-22 17:08:01 - 中学数学试题数列的构造法是什么?
https://www.ouer.net/chuzhongshuxue/fdr7.html - 2022-09-19 15:38:11 - 中学数学试题高二数列难题已知命题 (若数列An为等差数列,有A(m+n)=(nAn-mAm)/(n-m),m不等于n.m,n属于N*)是真命题.现已知数列bn bn大于0为等比数列,若类比上述结论,则可得b(m+n
https://www.ouer.net/chuzhongshuxue/vzn6.html - 2022-10-25 15:02:17 - 中学数学试题三个数列成等比数列,它们的和等于14,积等于64,求这个数列..等比则a2²=a1a3a1a2a3=64所以a2³=64a2=4设a1=a2/qa3=a2q则4/q+4+4q=142q
https://www.ouer.net/chuzhongshuxue/us4x.html - 2022-10-20 14:29:40 - 中学数学试题已知等差数列{an}满足a2=0,a6+a8=-10(1)求数列{an}的通项公式(2)求数列{an/2(n-1)}的前n项和第二问数列分母是2的n-1次方. 1)a6
https://www.ouer.net/shuxue/nzwz0.html - 2021-06-28 02:02:31 - 数学作业答案已知数列{an}的前n项的和Sn=n²+c,(c为常数),求数列的通项公式,并判断{an}是不是等差数列..an=sn-s(n-1)=n²+c-[(n-1)²+c]=2n-
https://www.ouer.net/chuzhongshuxue/vsaz.html - 2022-10-27 22:49:15 - 中学数学试题函数f(x)单调有界,Xn是数列,则若Xn单调那么数列{f(Xn)}收敛.如果Xn是递减数列?
https://www.ouer.net/chuzhongshuxue/fs0.html - 2022-01-29 17:56:20 - 中学数学试题已知数列{an}是首项为a1=1/4,公比q=1/4的等比数列,设bn+2=3log1/4an(n属于N*),数列{Cn}Cn=an×bn1、求证bn是等差数列2、求数列Cn的前n项和Sn.
https://www.ouer.net/shuxue/nzwda.html - 2021-06-28 02:19:48 - 数学作业答案[急]数学:等比数列和等差数列的通项公式?. 等比:an=a1·q^(n-1)等差:an=a1+(n-1)d
https://www.ouer.net/shuxue/nfn10.html - 2021-01-06 11:58:47 - 数学作业答案定义,若数列{an}满足│an +1│ +│an│=d(n∈N*d为常数)则称{an}为等绝对定义若数列{an}满足│a(n +1)│+ │an│=d(n∈N*d为常数)则称{an}为“绝对和数列”,d
https://www.ouer.net/chuzhongshuxue/88m.html - 2022-02-20 14:22:15 - 中学数学试题设数列{an}为等差数列,且a5+a8+a13+a16=2000,求S20=?.
https://www.ouer.net/chuzhongshuxue/c56d.html - 2022-10-01 04:08:27 - 中学数学试题数列an,a1=1,n>=2,an=(根号下sn +根号sn-1)/2,求数列根号sn为等差数列,及an通项.
https://www.ouer.net/shuxue/nzwn0.html - 2021-01-28 05:41:03 - 数学作业答案已知{an}是各项均为正数的等比数列,{根号an}是等比数列么?过程.是
https://www.ouer.net/chuzhongshuxue/vmev.html - 2022-11-02 01:02:54 - 中学数学试题已知数列{a}是等比数列,Sn是其前n项和,a1,a7,a4成等差数列,求证2S3,S6,S12-S6成等比数列.a7=a1q^6a4=a1q^3因为a1,a7,a4成等差数列所以a7=(a1+a4)/
https://www.ouer.net/chuzhongshuxue/z273.html - 2022-05-03 07:00:19 - 中学数学试题设数列an是公差不为0的等差数列,Sn为其前n项和,数列bn为等比数列,且a1=b1=2,S2=5b2,S4=25b3.(1)求数列an和bn的通项公式an及bn(2)设cn满足cn=Sn*bn,问当n
https://www.ouer.net/chuzhongshuxue/rekr.html - 2022-10-09 18:27:06 - 中学数学试题公差不为0的等差数列的第二、第三、第六项构成等比数列 那么这个等比数列的公比是多少.设公差数列首项a,公差d,d≠0(a+2d)^2=(a+d)(a+5d)a^2+4ad+4d^2=a^2+6ad+5d
https://www.ouer.net/chuzhongshuxue/un0k.html - 2022-10-18 01:54:10 - 中学数学试题高中数学必修五等比数列数列{An}的前n项和记为Sn,已知A1=1,A(n+1)=Sn(n+2)/n(n=1,2,3...)证明数列{Sn/n}是等比数列.将它转换成Sn的递推式A(n+1)=Sn(n+
https://www.ouer.net/chuzhongshuxue/s7da.html - 2022-10-16 07:57:43 - 中学数学试题已知等差数列{an},a2=9,a5=21,令bn=2的an次方,求证:数列{bn}是等比数列如题.d=(21-9)/3=4a1=5an=a1+(n-1)*d=4n+1bn=2^(4n+1)bn-1=2
https://www.ouer.net/chuzhongshuxue/f6u8.html - 2022-09-24 00:24:43 - 中学数学试题已知数列{an}的前n项和为Sn,Sn=13(an−1)(n∈N*).(Ⅰ)求a1,a2;(Ⅱ)求证数列{an}是等比数列..(Ⅰ)由S1=13(a1−1),得a1=13(a1−1)∴a1=−12又S2
https://www.ouer.net/chuzhongshuxue/u1v3.html - 2022-10-22 04:59:22 - 中学数学试题一道数学题(数列)在数列{a[n]}中,a[1]=1,a[n+1]=(1-1/(n+1))a[n](1).求数列{a[n]}的通项公式(2).若对一切a>1的自然数,不等式a[n+1]+a[n+2]+…
https://www.ouer.net/chuzhongshuxue/hfe9.html - 2022-05-26 09:00:12 - 中学数学试题在等比数列{an}中,a1=2,前n项和为Sn,若数列{an+1}也是等比数列,则Sn等于?.
https://www.ouer.net/shuxue/nzwnc.html - 2020-11-16 18:12:37 - 数学作业答案数列 (9 10:46:33)数列{an}中,已知a1=1,an=an-1+an-2+.
https://www.ouer.net/chuzhongshuxue/r2a7.html - 2022-10-07 13:32:42 - 中学数学试题幂数列是什么意思?.
https://www.ouer.net/shuxue/nzwhn.html - 2021-06-28 02:04:40 - 数学作业答案关于高中数学“数列”的所有有关公式数列的公式.
https://www.ouer.net/shuxue/nzwd4.html - 2021-01-23 04:11:55 - 数学作业答案若数列an是公差d≠0得等差数列,数列bn是公比q≠1的等比数列.a1=b1=1 a2=b2 a8=b3 (1)求d和q.根据a2=b2,得1+d=qa8=b3,得1+7d=q²解得d=5,q
https://www.ouer.net/chuzhongshuxue/02s5.html - 2022-11-21 18:05:48 - 中学数学试题设数列{an}是公比大于1的等比数列,Sn为数列{an}的前n项和.已知S3=7,且a1+3,3a2,a3+4构成等差数列.(Ⅰ)求数列{an}的通项公式;(Ⅱ)令bn=lna3n+1,n=1,2…,求数列
https://www.ouer.net/chuzhongshuxue/ufmv.html - 2022-10-19 20:38:37 - 中学数学试题