名校
解题方法
1 . 已知等差数列共有
项,各项与公差
均不为零,若将此数列删去某一项后,得到的数列(按原来顺序)是等比数列,则所有数列
组成的集合为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49dac16bbcffa236fbee961ada16420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26206bb5dafe7e8f0ac3775a4b2029c5.png)
您最近一年使用:0次
2023-03-23更新
|
575次组卷
|
4卷引用:上海市南洋模范中学2023-2024学年高二上学期开学考数学试题
名校
2 . 已知
成等比数列,则等比中项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff33c8b5cd9a2143d0d0367ef322cbea.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db92b82aef9ff026bfa6a9dcfd00f963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff33c8b5cd9a2143d0d0367ef322cbea.png)
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解题方法
3 . 数列
中,已知
对任意
都成立,数列
的前
项和为
.
(1)若
,求数列
的通项公式;
(2)若
,求
的值;
(3)是否存在实数
和
,使数列
是公比不为1的等比数列,且任意相邻三项
,
按某顺序排列后成等差数列?若存在,求出所有实数
和
的值;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/c5440d1da50e214586298e5bca5f80ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.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)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/563d666527c55930006de4e296b3745d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434f472d73e85484a60f8a1696581bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b50ec7342673cc1f11b613c3efd3c6c.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64b3c3cc83c46cfc05820e09d50d691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d8af4e2b2c48c73e7897eb3da814c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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4 . 已知等比数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb708a25d30954a0a50b01d59453bbe.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/49da60ee8ea230b3a14750e64d3579f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb708a25d30954a0a50b01d59453bbe.png)
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名校
解题方法
5 . 将数列
中的所有项排成如下数阵:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9fc0474a00e00812c009e696c41389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c8b7ffc481ce608d68c467a5718fd7.png)
……
已知从第二行开始每一行比上一行多两项,第一列数
……,成等差数列,且
.从第二行起,每一行中的数按从左到右的顺序均构成以
为公比的等比数列,则下列结论错误的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9fc0474a00e00812c009e696c41389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c8b7ffc481ce608d68c467a5718fd7.png)
……
已知从第二行开始每一行比上一行多两项,第一列数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a18556fda4a825861f1170cdeb059ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a59636285f5098855b06b3d039bb99a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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6 . 若数列
满足
,则称该数列为“切线-零点数列”,已知函数
有两个零点1、2,数列
为“切线-零点数列”,设数列
满足
,
,
,数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2778e2dadff4d91102e6046bb5def8.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272b44a71d0bec02b3c4f3f05304f942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b24c2f0837fe6cf4160bc6de2690dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea2fdda67d2a98caafce60658a57c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4f51458f7e8c92a2a3c865f1d18b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0998bd7bdcf49633c773084eea9317.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/9b2778e2dadff4d91102e6046bb5def8.png)
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2023-03-10更新
|
868次组卷
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5卷引用:上海市延安中学2023届高三下学期开学考试数学试题
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7 . 若数列
满足
,前5项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7c8945f9c179e2b1491df9a503cefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5e85548547f534d505d0dca24d495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
您最近一年使用:0次
8 . 已知等差数列
中,首项
,公差
,且
是等比数列
的前三项.
(1)求数列
与
的通项公式;
(2)设数列
的前
项和为
,且记
,试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64d5b1d831630334e494c39d0343872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53c7d236a4d103969261bbd2efc365a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](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/65e689f53796a3b60518e97b14f8f7ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-03-10更新
|
333次组卷
|
2卷引用:上海市控江中学2022-2023学年高一下学期开学考试数学试题
名校
解题方法
9 . 某市市区内的A、B两超市同时开业,第一年的全年销售额都为P万元.由于经营方式不同,A超市第n年的销售额比前一年销售额多
万元;B超市前n年的总销售额为
万元.
(1)求两超市第n年销售额的表达式;
(2)若其中某一超市的年销售额不足另一超市的年销售额的50%,则该超市将被另一超市收购,判断哪一超市有可能被收购?如果有这种情况,将会出现在第几年.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a49976e59e2b60499f26cbb0027b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86af405ab76022f92606bcb2c4c6b812.png)
(1)求两超市第n年销售额的表达式;
(2)若其中某一超市的年销售额不足另一超市的年销售额的50%,则该超市将被另一超市收购,判断哪一超市有可能被收购?如果有这种情况,将会出现在第几年.
您最近一年使用:0次
10 . 记
为公比不为1的等比数列
的前
项和,
,
.
(1)求
的通项公式;
(2)设
,若由
与
的公共项从小到大组成数列
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/07d0fca4451bbf1be3db76e45ebbc26f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d7c9bb2b4b0ef3bbb0ff448cf5ca33.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6eb2a0ef679a87b02e566e879a49a7.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/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-02-21更新
|
1696次组卷
|
8卷引用:上海市七宝中学2022-2023学年高二下学期开学摸底数学试题
上海市七宝中学2022-2023学年高二下学期开学摸底数学试题(已下线)核心考点06数列-【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)吉林省梅河口市第五中学2023届高三下学期第一次模拟考试数学试题(已下线)专题10数列(解答题)黑龙江省哈尔滨德强高级中学2023-2024学年高三上学期期中考试数学试题(Ⅱ卷)江西省部分地区2024届高三下学期3月月考数学试题广西壮族自治区南宁市、河池市2024届高三教学质量监测二模数学试题河南省部分重点中学2024届高三下学期三月质量检测联考数学试题