名校
解题方法
1 . 若实数
,
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd989ddfbed4a6aa18ea57734522153.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99137cb98f861f53439fb56196610f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd989ddfbed4a6aa18ea57734522153.png)
您最近一年使用:0次
2 . 若
,则化简
的结果是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26abe98a9dd5a4678bfad9f3b4e6a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61e42008519844d968b4e031d0dcaa7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
7日内更新
|
365次组卷
|
4卷引用:2024届河南省名校联盟考前模拟大联考三模数学试题
名校
3 . 已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ea034ad66364571736cc8ba56685d5.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() |
D.![]() ![]() |
您最近一年使用:0次
4 . 已知函数
,其中a,b均为正数.若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872a62953ce07c474ec6605631136b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06698b0909ab5dbbf1f526711a226f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fff6b302ca54edd67ad200dba9e976.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
5 . 设离散型随机变量
和
的分布列分别为
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ebe32a5013a5104260716fcc740da.png)
,
.定义
,用来刻画
和
的相似程度,设
,
.
(1)若
,
,
,求
;
(2)若
,且
的分布列为
求
的最小值;
(3)对任意与
有相同可能取值的随机变量
,证明:
的值不可能为负数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3097e6975627ac7a7fc78326aa3c680d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b945ead3c11ea96273ab77482497c010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d59165a1af56c9a1a39b4836fe1314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987292d893f960a7b4915a7023fa41eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ebe32a5013a5104260716fcc740da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e7f7f4284d08f7298e6eb8640bb569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7510226e3bef2768c91e7ba164bbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b091aa6eaac148b56e9013e17a14ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a18d2bd429301b5478dcd26c572266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ca76215449448e07b0ffb35f176ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c1c46297fe3d150d2bdbd6c238dae2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![]() | 0 | 1 | 2 |
![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c1c46297fe3d150d2bdbd6c238dae2.png)
(3)对任意与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c1c46297fe3d150d2bdbd6c238dae2.png)
您最近一年使用:0次
6 . 以曲线
拟合一组数据时,经
代换后的线性回归方程为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
___________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e2ce7187682ebc18b84e061f2b03ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee3eb02e38f79819792f24fa754cc66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e108a02e48c287e7ae446b9d2d7f947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
您最近一年使用:0次
解题方法
7 . 已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6723d006844c933e60df4df46222227d.png)
A.若![]() ![]() |
B.函数![]() ![]() |
C.函数![]() ![]() |
D.直线![]() ![]() |
您最近一年使用:0次
名校
8 . 已知
,且
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea134f599285e3d32d2ab3e7186990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05e2476605c7039b2302b79019f983d.png)
A.充要条件 | B.充分不必要条件 |
C.必要不充分条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2024-04-06更新
|
1578次组卷
|
6卷引用:河南省信阳市新县高级中学2024届高三考前数学仿真冲刺卷三
名校
解题方法
9 .
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f136265fede156326efa1f6d15de7db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1ff376c4e8f1bc4198ad4db3cb6803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f133211111f10ba4f59b5a222bd206.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-29更新
|
320次组卷
|
2卷引用:河南省漯河市高级中学2023-2024学年高一下学期3月月考数学试题
10 . 若是偶函数,则实数
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2024-03-28更新
|
472次组卷
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2卷引用:河南省部分重点高中2024届高中毕业班阶段性测试(七)数学试题