1 . 已知数列
的前
项和为
,
,给出以下三个命题:
①
;②
是等差数列;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28babe6d68eb0646f9e97bd9e01c3c86.png)
(1)从三个命题中选取两个作为条件,另外一个作为结论,并进行证明;
(2)利用(1)中的条件,证明数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99aed0821e3241d550edfdc7c329cf50.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e35ba37b0cc1d390e05391554e9660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99aed0821e3241d550edfdc7c329cf50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28babe6d68eb0646f9e97bd9e01c3c86.png)
(1)从三个命题中选取两个作为条件,另外一个作为结论,并进行证明;
(2)利用(1)中的条件,证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa2c40028103fd23931f8772b0cefa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c215db1d8f69757118ad405b78035628.png)
您最近一年使用:0次
2022-02-22更新
|
679次组卷
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3卷引用:新疆喀什第二中学2022届高三下学期开学考试数学试题
2 . 若数列
满足
(
,且
为实常数),
,则称数列
为
数列.
(1)若数列
的前三项依次为
,
,
,且
为
数列,求实数
的取值范围;
(2)已知
是公比为
的等比数列,且
,记
.若存在数列
为
数列,使得
成立,求实数
的取值范围;
(3)记无穷等差数列
的首项为
,公差为
,证明:“
”是“
为
数列”的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a308a3e9b4cbfaebc891850bca6d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8047f0a8bd0cf4e250cd0fe80093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a70994adb16e3b90738c1130ca21113.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1222cf2ecfe85c078a3c192fc3f02ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37933cfc60b4bd29f1684687ddd2cbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e954ddd309b0adf31b3627db0d8f7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fde3541708c770e48a06c28f9a3434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a9dc9d42849a5b67043241e0f04d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ce32f902c54d9540d0755acb252d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5ac20cde9cb0eec8853f409afcfe8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)记无穷等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89087b3022c9011d7ddf9ade06d137e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a70994adb16e3b90738c1130ca21113.png)
您最近一年使用:0次
2020-12-25更新
|
461次组卷
|
3卷引用:上海市行知中学2022届高三上学期开学考试数学试题
3 . 已知无穷数列
的首项为
,其前
项和为
,且
(
),其中
为常数且
.
(1)设
,求数列
的通项公式,并求
的值;
(2)设
,
,是否存在正整数
使得数列
中的项
成立?若存在,求出满足条件
的所有值;若不存在,请说明理由.
(3)求证:数列
中不同的两项之和仍为此数列中的某一项的充要条件为存在整数
且
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.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/4fade3b62af2d51880b021a075dcd551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7335c79ec0592fc36288f5135e86c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8212a513bceafbdb6e7e617a29079c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c1344592c925b273f2cb9b9e47ebbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6760775a38ed18ab8f346346e25de2ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636f37adeddc68d0830ecd7d1c61ff8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98b2a1269d8cb234c7cc9d49e75196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87a9ef1f87936695fb681df932efd10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54680219b440350ffc5f1f43b3b78e0.png)
您最近一年使用:0次
2020-12-23更新
|
388次组卷
|
4卷引用:上海市奉贤中学2022届高三上学期开学考数学试题
上海市奉贤中学2022届高三上学期开学考数学试题上海市普陀区2021届高三上学期一模数学试题(已下线)重难点01 数列(基本通项求法)-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)考向14 等差数列-备战2022年高考数学一轮复习考点微专题(上海专用)