名校
1 . 已知
是各项均为正整数的无穷递增数列,对于
,定义集合
,设
为集合
中的元素个数,若
时,规定
.
(1)若
,写出
及
的值;
(2)若数列
是等差数列,求数列
的通项公式;
(3)设集合
,求证:
且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542b4acf7b25b750fbe7205fd179b978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857369257ea1b23ef40ce7e3a0f058af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1202d58cd3ad66e7b23f01024566705b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc57d8a4f67a040435d8b206d3254bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6510d0816033afa001c130342bb7cda.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b6f99a33b14f53fb398a195aa2ec3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac648580405ecaa29e91d45738a08af7.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(3)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54e4701d4cb8d0133ad2044a7e0f52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1479e28bf6a8cb64ec7df77cd295f99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a6a3d1be93cf6d16ee6e0ce0497f46.png)
您最近一年使用:0次
2024-01-21更新
|
1334次组卷
|
7卷引用:江苏省常州市华罗庚中学2024届高三下学期4月二模训练数学试卷
江苏省常州市华罗庚中学2024届高三下学期4月二模训练数学试卷广东省江门市开平市忠源纪念中学2024届高三下学期高考冲刺考试(一)数学试卷北京市朝阳区2024届高三上学期期末数学试题(已下线)专题1 集合新定义题(九省联考第19题模式)讲(已下线)2024年高考数学二轮复习测试卷(北京专用)(已下线)黄金卷01(2024新题型)(已下线)微考点4-1 新高考新试卷结构压轴题新定义数列试题分类汇编
解题方法
2 . 设数列
的前n项和为
,且满足
.
(1)求数列
的通项公式;
(2)证明:数列
中的任意不同的三项均不能构成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294aba8a047b744f443363465d2d262f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
3 . 若无穷数列
和无穷数列
满足:存在正常数A,使得对任意的
,均有
,则称数列
与
具有关系
.
(1)设无穷数列
和
均是等差数列,且
,
,问:数列
与
是否具有关系
?说明理由;
(2)设无穷数列
是首项为1,公比为
的等比数列,
,
,证明:数列
与
具有关系
,并求A的最小值;
(3)设无穷数列
是首项为1,公差为
的等差数列,无穷数列
是首项为2,公比为
的等比数列,试求数列
与
具有关系
的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd9630eef5312838c202cf054e9ee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6f8cb2faaad82b53b2a66ee817a37.png)
(1)设无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9260f8989cfd0ffca5a49ffbc0668f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e67d6abc5e1ab4c45046d1ee37e328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2387880727d458702651d699e76d7d76.png)
(2)设无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2525f733e43b3a4558b83f10f20425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6f8cb2faaad82b53b2a66ee817a37.png)
(3)设无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d928d897331d22ce7a2d230ed7138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e116f14c30b56ba916164b2da784b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6f8cb2faaad82b53b2a66ee817a37.png)
您最近一年使用:0次
2020-08-04更新
|
714次组卷
|
4卷引用:江苏省南京师范大附中2020届高三下学期6月高考模拟(1)数学试题
江苏省南京师范大附中2020届高三下学期6月高考模拟(1)数学试题上海市青浦区2021届高三上学期一模(期终学业质量调研)数学试题上海市青浦区2021届高三上学期一模数学试题(已下线)上海高二下学期期末真题精选(压轴60题35个考点专练)-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)
4 . 已知
且
,如果数列
满足:对于任意的
,均有
,其中
,那么称数列
为“紧密数列”.
(1)若“紧密数列”
:
为等差数列,
,求数列
的公差d的取值范围;
(2)数列
为“紧密数列”,求证:对于任意互不相等的
,均有
;
(3)数列
为“紧密数列”,对于任意的
,且
成立,求S的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b0e3b00fe47801afb53ec56706c21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9f6a589b0c3d7131e6dfe7316299cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6559598727fb120a5cdbf4f15510615d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若“紧密数列”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49ac38d12dd22117469a0bdc0d779f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c11bafd989e62f3f4ed312e000b7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6ea2ccf16d9b92c83e2a31d56bb55b.png)
(3)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49ac38d12dd22117469a0bdc0d779f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af94673c4b906ff0129be47b3f341cc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246af77cc838df2b9f0f455cc965dc59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
5 . 已知数列
的前
项和为
,
.
(1)若
,求证:
,
,
必可以被分为1组或2组,使得每组所有数的和小于1;
(2)若
,求证:
,
,…,
必可以被分为
组(
),使得每组所有数的和小于1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d784b3a582342a9a36b14546fa560552.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438591acc190a7601b0c2a117b6a3415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec18c55e429ee929de7c179f07a94421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b103f1d816ef8a79e02bd82e8651ce.png)
您最近一年使用:0次
2019-04-18更新
|
628次组卷
|
4卷引用:【校级联考】江苏省泰州中学等2019届高三第二学期联合调研测试数学试题
【校级联考】江苏省泰州中学等2019届高三第二学期联合调研测试数学试题江苏省泰州中学、宜兴中学等校2019届高三4月联考数学试题(含附加题)【校级联考】江苏省高三泰州中学、宜兴中学、梁丰2019届高三第二学期联合调研测试数学试题(已下线)专题15 数列不等式的证明 微点6 数列不等式的证明综合训练
解题方法
6 . 设
个不全相等的正数
,
,…,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
依次围成一个圆圈.
(1)设
,且
,
,
,…,
是公差为
的等差数列,而
,
,
,…,
是公比为
的等比数列,数列
,
,…,
的前
项和
满足
,
,求数列
的通项公式;
(2)设
,
,若数列
,
,…,
每项是其左右相邻两数平方的等比中项,求
;
(3)在(2)的条件下,
,求符合条件的
的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b02667b5adf64f5aed72f9f264be23.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36290bba771bdbfd1172973e7ef2ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7dd7b0af4d4585a71e0d91fb1727e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475fdc2128fcc98e4bfe451fd1f49120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c28a854eda450ce5a2b68879b11992d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061a693b52b6327820b9352ecae36f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d61a111ab981437a0f71e6b063d8185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9025ff4c0b96ef6caa3a731439d4726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9651204c54475c2e8cda8d0a6eeba177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45017cc279aeaa97cb521f88c09da9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0451b801bc2b6932890d76cc0a2760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
(3)在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f87f22c524a4686608c6fba794b9217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
7 . 若数列
满足①
,②存在常数
与
无关),使
.则称数列
是“和谐数列”.
(1)设
为等比数列
的前
项和,且
,求证:数列
是“和谐数列”;
(2)设
是各项为正数,公比为q的等比数列,
是
的前
项和,求证:数列
是“和谐数列”的充要条件为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ff128b22e3abab2ba8f4d3012c33ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e19364ae7c7c56b2c27ffb7da111d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7207cae2e50fa00d0f79ca5d61aaa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055ac1dc6b870acc5d654f412e7f8ef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36fc83ff481935ce22168c809930545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519af3f19dde038fab2e68b5e2a5387.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519af3f19dde038fab2e68b5e2a5387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c9b799432a92e9fa83ecdba7183f36.png)
您最近一年使用:0次
2013·江苏·一模
8 . 设函数
的定义域为M,具有性质P:对任意
,都有
.
(1)若M为实数集R,是否存在函数
(a>0且a≠1,
) 具有性质P,并说明理由;
(2)若M为自然数集N,并满足对任意
,都有
. 记
.
(ⅰ) 求证:对任意
,都有
且d(x)≥0;
(ⅱ) 求证:存在整数0≤c≤d(1)及无穷多个正整数n,满足d(n)=c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b672f564d03ed46d092bb130f229ad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfc595518cf752e1c7903dfff93dbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5787c168674d986336b03b6a6a7c71f1.png)
(1)若M为实数集R,是否存在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390a9f0187827802e906982b207aa9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
(2)若M为自然数集N,并满足对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfc595518cf752e1c7903dfff93dbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b693a6d793394cc8e0064b52b8f97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de6361585c1b4b2d503bc8a8e9001cc.png)
(ⅰ) 求证:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfc595518cf752e1c7903dfff93dbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39649b9ad800d5cf60e58f04b8ff4825.png)
(ⅱ) 求证:存在整数0≤c≤d(1)及无穷多个正整数n,满足d(n)=c.
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