1 . 已知
关于x的一元二次不等式
的解集中有且仅有3个整数,则a的值可以是________ (写出任何一个满足条件的值即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54700061d9f312959c7159c268dede44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5318889c409a850e56a743d550b34e.png)
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2 . 已知数列
为等比数列,若数列
也是等比数列,则数列
的通项公式可以为___________ .(填一个即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2aa442138e644b14e4b163ba4119e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2021-05-03更新
|
1336次组卷
|
7卷引用:湖南省株洲市2021届高三下学期教学质量统一检测(二)数学试题
湖南省株洲市2021届高三下学期教学质量统一检测(二)数学试题(已下线)专题7.4 等比数列-2022届高三数学一轮复习精讲精练北师大版(2019) 选修第二册 名师精选 第三单元 等比数列 B卷人教B版(2019) 选修第三册 名师精选 第三单元 等比数列 B卷(已下线)卷05 等比数列·B卷·能力提升 -【重难点突破】2021-2022学年高二数学名校好题汇编同步测试卷(人教A版选择性必修第二册)2023版 苏教版(2019) 选修第一册 名师精选卷 第十一单元 等比数列 B卷湖北省武汉市第一中学2021-2022学年高二上学期12月月考数学试题
3 . 已知
中,
,
,
的对边分别为a,b,c,若
,
,给出下列条件中:①
,②
,③
,能使
有两解的为____________ .(只要写出一个正确答案的序号即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1ec9c5eaed4c211a040a2a33fb7c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef98fdbaa33fc752c802e833f8b08a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
解题方法
4 . 已知数列
的各项均为非零实数,其前
项和为
,
,且对于任意的正整数
均有
.(1)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
______ ;(2)若
,则满足条件的无穷数列的一个通项公式可以是![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b494faa6c15c829953ed56252d3817a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462b733b51c54407655bd9fe71e88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b0bbb7fe5e9ea2366c663f81731ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
2023-09-13更新
|
443次组卷
|
2卷引用:湖南师范大学附属中学2024届高三上学期月考(一)数学试题
5 . 某同学在复习数列时,发现曾经做过的一道题目因纸张被破坏,导致一个条件看不清(即下题中“已知”后面的内容看不清),但在(1)的后面保留了一个“答案:
成等差数列”的记录,具体如下:
记等比数列
的前n项和为
,已知___________________.
①判断
的关系;(答案:
成等差数列)
②若
,记
,求证:
.
(1)请在本题条件的“已知”后面补充等比数列
的首项
的值或公比q的值(只补充其中一个值),并说明你的理由;
(2)利用(1)补充的条件,完成②的证明过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3cfe031c410bb340ea3cad79c4fdcc.png)
记等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3cfe031c410bb340ea3cad79c4fdcc.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e938815320a9c862d34eda30c5558889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d53257a6225236a3c3274834445412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef7c30edb39c3d17ee0e8fc33508aab.png)
(1)请在本题条件的“已知”后面补充等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)利用(1)补充的条件,完成②的证明过程.
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6 . 给定整数
,由
元实数集合
定义其随影数集
.若
,则称集合
为一个
元理想数集,并定义
的理数
为其中所有元素的绝对值之和.
(1)分别判断集合
是不是理想数集;(结论不要求说明理由)
(2)任取一个5元理想数集
,求证:
;
(3)当
取遍所有2024元理想数集时,求理数
的最小值.
注:由
个实数组成的集合叫做
元实数集合,
分别表示数集
中的最大数与最小数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a74fd362793540afbf0d97d96e34f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a004e53d6da57977a26325a5336e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)分别判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/798fbe13094bfa183eb57fae77647508.png)
(2)任取一个5元理想数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b942b7722c385c79c70ba8928d38af.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd2861d53cafb06f076c59b25bdfd857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
注:由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc0cbd6a65ad74e65716c682d6985cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
7 . 高铁的建设为一个地区的经济发展提供了强大的推进力,也给人们的生活带来极大便捷.以下是2022年开工的雄商高铁线路上某个路段的示意图,其中线段
、
代表山坡,线段
为一段平地.设图中
坡的倾角满足
,
长
长
长
.假设该路段的高铁轨道是水平的(与
平行),且端点
分别与
在同一铅垂线上,每隔
需要建造一个桥墩(不考虑端点
建造桥墩)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/c74f6394-8bbb-41cf-9c85-b0607eb123fd.png?resizew=200)
(1)求需要建造的桥墩的个数;
(2)已知高铁轨道的高度为
,设计过程中每
放置一个桥墩,设桥墩高度为
(单位:
),单个桥墩的建造成本为
(单位:万元),求所有桥墩建造成本总和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e731b605eba332df44bea683c4aee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27db0d05bd138ad752b4cddc2e3bed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8392f26db20adb474c5e7673036fe3d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4ef601f9b9db4f7fb5f0b0dd2e0a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617b624dd6e80853ea8dda1b5591cdd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed8f425894336757c6feb514a884fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4ee159aea403220848b14b8e81dc20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/c74f6394-8bbb-41cf-9c85-b0607eb123fd.png?resizew=200)
(1)求需要建造的桥墩的个数;
(2)已知高铁轨道的高度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ec72d07385ed62ec9540083958be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1369d3503abf9bfcbdab0d6a4717017c.png)
您最近一年使用:0次
2023-03-06更新
|
1402次组卷
|
3卷引用:湖南省株洲市第二中学2023-2024学年高三下学期开学考试数学试卷