1 . 5和45的等比中项是_________________ .
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2 . 若
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccb287e98a6a68b553969da381858fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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3 . 3名男生和2名女生站成一排.若男生不相邻,则不同排法种数为______ (用数字做答).
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名校
4 . 由数据
可得
关于
的线性回归方程为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dd3df2203ad477a391ce4da2bc71bb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0d7f2407d2675876ad46a6a3d7cfb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a01a9162e86ae5838e19158942f4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eabb220259c8e9c24db37b5f96185add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dd3df2203ad477a391ce4da2bc71bb.png)
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名校
5 . 某中学 1600 名学生参加一分钟跳绳测试,经统计,成绩
近似服从正态分布
,已知成绩小于 130的有 300 人,则可估计该校一分钟跳绳成绩
在
次之间的人数约为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf88edaa9d28b99da3f0a4f70a422ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8688f950cc56735bd8ee67eccb0c73cb.png)
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解题方法
6 . 已知随机变量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870528aa6be6f56bae0eb6b10a765c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bed89638668bd715e6278c382091c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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7 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ac09a9667e4642ead4266f938e2c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
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解题方法
8 . 设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fbf24a7a97adfa533ad888e51ea149.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24589796123492ce3e9846af11e0f4bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fbf24a7a97adfa533ad888e51ea149.png)
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解题方法
9 . 设离散型随机变量
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01142c9231917cc48198f543d732a0a2.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db07e994fc0220e488d2affc32ebb0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01142c9231917cc48198f543d732a0a2.png)
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解题方法
10 . 在
中,角
的对边分别为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8c53f43770c0d22fcbcd771a933fde.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b254e5ee33a298ef218adbde0d4385b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8c53f43770c0d22fcbcd771a933fde.png)
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2024-05-04更新
|
735次组卷
|
4卷引用:江苏省无锡市辅仁高级中学2023-2024学年高二下学期期中考试数学试题