1 . 已知非零数列
满足
,
.
(1)求证:数列
是等比数列;
(2)若关于
的不等式
有解,求整数
的最小值;
(3)在数列
中,是否存在首项、第
项、第
项(
),使得这三项依次构成等差数列?若存在,求出所有的
;若不存在,请说明理由.
![](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/453f8c230ec9bdc197459bae57b15b9e.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5971cda748462d6125bb222e69e88a0.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839b44ce39b1a7705fa8f87c1d6bfd3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4231521442fed6c58d744276281ed52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5b266f565d738a9ac15199eb82206f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4224b6c936b438df381a89eda0accf89.png)
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2020-02-04更新
|
465次组卷
|
5卷引用:2016届江苏省南通市石庄高中高三上第三次调研文科数学试卷
名校
2 . 春夏季节是流感多发期,某地医院近30天每天入院治疗的人数依次构成数列
,已知
,且满足
,则该医院30天入院治疗流感的人数共有______ 人.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cefeddf71dca8ae824328df3f0e5e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0ddd7cfa55f41314805fc28da14683.png)
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2019-06-21更新
|
660次组卷
|
6卷引用:2015届江苏省如东高中高三上学期第9周周练理科数学试卷
解题方法
3 . 数列
定义如下:
,若
,则正整数
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47c7e07855287402297f53b3f305e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd158a5c484f8690addb4eec433c708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解题方法
4 . 数列
定义如下:
,
,
,
….若
,则正整数
的最小值为_________ .
![](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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c1356a0ce534d982da85db15480b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca6243b135eabee59a1d762183e58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee775e57f74394b638a4f46266a3b08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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14-15高三上·江苏苏州·期中
5 . 已知等差数列
的前
项和为
,若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f807c6c7eb57aa251d8450357787b3e.png)
.
(Ⅰ)求数列
的通项公式;
(Ⅱ)对任意的
,将数列
中落入区间
内的项的个数记为
.
①求数列
的通项公式;
②记
,数列
前
项的和为
,求出所有使得等式
成立的正整数
,
.
![](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/7961605fa4f2c480c67eed1d9e5b43ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f807c6c7eb57aa251d8450357787b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0c73a1455fc61a2239cb62de1f3c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8b7b0ec9ffff2589bbb2e528d31455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c320a0619c63a5b650a1a94c0a5679.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c320a0619c63a5b650a1a94c0a5679.png)
②记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21580419c0f46af81d38f85398365360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ab8dbdcb039662a5bdbb9070c10a62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e74be91bfe4bc209da7539dbf9b72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a973224ab289e1824b512c3ddf8768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2016-12-03更新
|
1107次组卷
|
3卷引用:2015届江苏省南通中学高三12月月考理科数学试卷
11-12高三上·江苏·阶段练习
解题方法
6 . 将函数
在区间
内的极值点按从小到大的顺序排列,构成数列
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
_____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f446fc1d548f9209a9ff7ab598307f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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11-12高三上·江苏·阶段练习
名校
7 . 已知数列
的前
项和
,数列
是正项等比数列,且
,
.
(1)求数列
和
的通项公式;
(2)记
,是否存在正整数
,使得对一切
,都有
成立?若存在,求出M的最小值;若不存在,请说明理由.
![](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/e111e8791760c5e3fcdb0e942a7c13b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d8e6460c652593ff0b6b812c83e7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89ee67eac7494f1095f523342806bb4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac07953530e3c248b3438fb200fb1661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e04ebc752edb3823eadb8baeac4f1b.png)
您最近一年使用:0次
10-11高三上·江苏泰州·阶段练习
8 . 已知数列
是等差数列,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456822a2e92c692eecf980c3344416c3.png)
(1)判断数列
是否是等差数列,并说明理由;
(2)如果
(k为常数),试写出数列
的通项公式;
(3)在(2)的条件下,若数列
得前n项和为
,问是否存在这样的实数k,使
当且仅当
时取得最大值.若存在,求出k的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456822a2e92c692eecf980c3344416c3.png)
(1)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3007c986dbe4df14abf37bc1ec1b0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
(3)在(2)的条件下,若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aadc4f26938f7a9d55006ab4d3c1e102.png)
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