名校
解题方法
1 .
元向量(
)也叫
维向量,是平面向量的推广,设
为正整数,数集
中的
个元素构成的有序组
称为
上的
元向量,其中
为该向量的第
个分量.
元向量通常用希腊字母
等表示,如
上全体
元向量构成的集合记为
.对于
,记
,定义如下运算:加法法则
,模公式
,内积
,设
的夹角为
,则
.
(1)设
,解决下面问题:
①求
;
②设
与
的夹角为
,求
;
(2)对于一个
元向量
,若
,称
为
维信号向量.规定
,已知
个两两垂直的120维信号向量
满足它们的前
个分量都相同,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d617b088816e03a283123e29e4dbdca.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086eb439f6a1578fdba904825340772d.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/efee470d0232b6b37f2fb2ab15aae0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948eea3409b959c7248d68a1a081819d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b1e734f151a88ccb702148615db27d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5ab6e54fc0c6b846c8d860860c087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db1cd89b86c99ce96a9336eb3b09c9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be594c4e8c6693571d71fa7c1951796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a7cf91ca4cddeef99e8873ecc6fc37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05932f1afdfa963def3c811591eb62bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d69dab2a6743011b461f62448890316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c21920a0a39b1604e130601f061b056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eab8e66f785800a153d34421b2e5540.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a22804cdf4a90edff02dbb01b7481b.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23c7e4c34891b3435c39f4989470ccf.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac852f327effde190b9ebf3dd08e037c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f7e488464e41e1a1e1eed427154aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
(2)对于一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e363087dcbe11e11a9ec545570735c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94fcc44ac04f54d5fcc1a6154b8b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac852f327effde190b9ebf3dd08e037c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2772cf7495c2c4c70086e7d936752d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3c80a2adf39204ce112bda7115bf40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8af44e1a8c05007f2137fa2d1907db.png)
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2024-03-26更新
|
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5卷引用:山西省太原师范学院附属中学2023-2024学年高一下学期3月质量检测数学试题
2 . 已知实数
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ecb2bfd4b5d506a91167e258a6b7062.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331a997bdf8a6001862563321d897d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ecb2bfd4b5d506a91167e258a6b7062.png)
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3 . 若实数
,
,
满足
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150251f77398a5c86cd7bb4dadcd778a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146c020b931cc2271f14362588e47b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f119309f3ccf206d9f176b31491b54.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-05更新
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2卷引用:山西省太原市2023-2024学年高一上学期期末数学试题
4 . 已知函数
,若方程
恰有6个不相等的实数根,则实数
的值可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d617879bde7ef6c5c8957a8af0328803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee3f5e061231248191711acd7cb261c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知函数
,函数
是
的反函数.
(1)若
的值域为
,求实数
的取值范围;
(2)是否存在实数
,便得函数
在
上的值域为
?若存在,求出实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cc82c265dd9669c5ef3e32ba17471f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a00aefe8f4cf676d05ba6fb0303bc032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01520356d39e4bd793fc4f16a284219e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f0dbc7a1166bd79a9b52d3c59e6a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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名校
6 . 已知
,
且满足
,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb528a7dcb5019a05547212c8e1077b.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2023-12-24更新
|
303次组卷
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2卷引用:山西省太原市外国语学校、成成中学校2023-2024学年高一上学期12月质量监测数学试题
名校
7 . 已知函数
(
)是偶函数.
(1)求k的值;
(2)若函数
(
),是否存在实数m,使得
的最小值为0?若存在,求出实数m的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db976f290e760aafd43e7e0b513383ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aff8d9b6533ff319420cdc5e8740b04.png)
(1)求k的值;
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c30337e2a643b0028f5e7fbbc2d7c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e46371f310e03a153a1698aad9d4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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解题方法
8 . 某公司计划从甲、乙两种方案中选择一种方案,进行广告宣传拓展业务.市场调研表明,采用甲方案的宣传费用
(单位:十万元)与其利润
(单位:百万元)之间的关系是
,乙方案的宣传费用
(单位:十万元)与其利润
(单位:百万元)之间的关系是
,对于
,用
表示
,
中的最大者,记为
.
(1)求
的解析式;
(2)已知该公司的宣传费用预算为
(单位:十万元),以利润为决策依据,请问该公司应投入多少宣传费用
(单位:十万元)?并求出相应的利润
(单位:百万元).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2577b45245cb355b9eb39bc9970eae8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab3232b625de4d7212e6773500ddcd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3add1679c27392a1a7f635723a4b36eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3859cd3de4d6d485df050b0f5321d6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c065dc2782f5e5a662df2ea357b9c31.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3859cd3de4d6d485df050b0f5321d6c6.png)
(2)已知该公司的宣传费用预算为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93a232c88870d213a7b74a796a1ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5451e80dbfda746223d73cc0a26e220a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解题方法
9 . 已知不等式
恒成立,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f8363c6b3471cd9c19bd6a16e615fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ed94b84f62ef1105f93924aed564f0.png)
A.![]() | B.4 | C.![]() | D.8 |
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名校
解题方法
10 . 已知函数
满足
,当
时,
且
,若当
时,
有解,则a的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa29993000b5ffcc530111dbcc700eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4ed37e1a0c5ba92ae64e65fe638ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab4eef64fe08caa3feccb4f7a2be5c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-10-11更新
|
1829次组卷
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5卷引用:山西省太原市山西大学附中2023-2024学年高一上学期12月模块诊断数学试题