1 . 已知首项为
的正项数列满足
满足
,若存在
,使得不等式
成立,则
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02cf0752fc5bcf7c7af431ee56e9ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2771c5f04582c545e0f9afc8a2cb9597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37c4d009d6130c16a2c5f120c8deb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-05-29更新
|
603次组卷
|
2卷引用:江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷
名校
2 . 已知数列
的通项公式为
,若满足
,且
,对任意
恒成立,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7440fd38cdd87baecc4a6b032b170bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf2ae5bbc39e1927c66b3385b589010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32e2f964bb664deba92b0f9ea5f0d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fb80d6cd5e7a523ecffed2935692a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
3 . 已知数列
满足
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c138b8f0693c62eb2714006d1c0894ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77288bfa684c2a9ca00c75743232a0e3.png)
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名校
解题方法
4 . 已知数列
满足
,若对于任意的
都有
成立,则实数a的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78a703bd65884f831cdfa51b4eaa2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a5945ce5c2114af8c18718ca8dc899.png)
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5 . 数列
满足
,
,
,定义函数
是数列
的特征函数,则下列说法正确的是_____________
①当
时,数列
单调递增
②当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15ffa7fecea3704dc892ea8cd513c59.png)
③当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14abbc8d350e321d134eab2003ef46f4.png)
④当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b96fb33ef7cd9473aabc5b15f119fc.png)
时,记数列
的前
项和为
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfb19f0c37a72b33083ae9319f11a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502416314c8c26f8442e639ea6a5db13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff9681471371af6e3d0934caee1004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15ffa7fecea3704dc892ea8cd513c59.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda3e4033f7da0bc7880e9c62424727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14abbc8d350e321d134eab2003ef46f4.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b96fb33ef7cd9473aabc5b15f119fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab03556c333ab0b55fe86c937b2a5763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/803932fd89e4e8055d7187c29a46de47.png)
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6 . 写出一个同时具有下列性质①②③的数列
,①无穷数列;②递减数列;③每一项都是正数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2021-10-07更新
|
1215次组卷
|
8卷引用:江西省南昌市第五中学2022-2023学年高二下学期第一次月考数学试题
7 . 已知数列
是以1为首项,2为公差的等差数列,
是以1为首项,2为公比的等比数列,设
,
,当
时,
的最小值为__________ .
![](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/000f01319364c59dee948848fc4de4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39fe4fa6a03e969e339f9c1812ef633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69694f625955f414c8950bd5d37f31e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2021-07-31更新
|
234次组卷
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4卷引用:江西省南昌市第十中学2020-2021学年高一下学期第一次月考数学试题
江西省南昌市第十中学2020-2021学年高一下学期第一次月考数学试题(已下线)4.3 等比数列-2021-2022学年高二数学尖子生同步培优题典(苏教版2019选择性必修第一册)新疆和田地区第二中学2022-2023学年高三上学期11月期中考试数学(理)试题天津市宁河区芦台第一中学2019-2020学年高二上学期第一次月考数学试题
8 . 已 知 数 列
与
满足
,若
,
且
对一切
恒成立,则实数
的取值范围是______ .
![](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/01697db06c0ac1ac0864846d5763ea34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366dfedff1a1a96ec27650375b680059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931b60421ff3f0b260235eed1f9a479a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6ade2427796424a8cec029c0deeb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deda945164283569437cda6976fe35ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2023-01-04更新
|
775次组卷
|
7卷引用:江西省南昌市湾里区第一中学等六校2020-2021学年高一下学期期中联考数学试题
名校
解题方法
9 . 若数列
满足
,且
,若使不等式
成立的
有且只有三项,则
的取值范围为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c492ef0c41f7a2f4c15fb27df44a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad5a12a46ccaaf3f143332cd187dee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e507eec2900955f1f1d911ceab0052d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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名校
10 . 已知数列
的前
项和
满足:
(
),则数列
中最大项等于______ .
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3193d9ce40c46bb3f94ea0b947589a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
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2020-02-07更新
|
1680次组卷
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8卷引用:2020届江西省南昌市新建二中高三数学模拟试卷 (二)理科数学试题
2020届江西省南昌市新建二中高三数学模拟试卷 (二)理科数学试题2020届安徽省皖东县中联盟上学期高三期末考试数学(理)试题2020届高三2月第02期(考点06)(理科)-《新题速递·数学》安徽省皖北名校2020-2021学年高二上学期第二次联考数学试题(已下线)第21练 等差数列-2021年高考数学(文)一轮复习小题必刷(已下线)热点06 数列-2021年高考数学【热点·重点·难点】专练(山东专用)浙江省杭州第二中学2021届高三下学期3月开学考试数学试题(已下线)第22讲 数列的单调性与最值问题-2022年新高考数学二轮专题突破精练