名校
1 . 现有6位老师(含甲、乙)随意排成一排拍照留念.
(1)求甲、乙不相邻的概率;
(2)设甲、乙之间所隔人数为
,例如,当甲、乙相邻时,
,求
的数学期望.
(1)求甲、乙不相邻的概率;
(2)设甲、乙之间所隔人数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fef57584523e293a6f482bb4cf31c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
您最近一年使用:0次
2021-07-29更新
|
175次组卷
|
2卷引用:重庆市渝北区礼嘉中学2021-2022学年高二下学期期末模拟数学试题
名校
2 . 已知
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f500cf8b8b2b589f8267b737d2d9b57.png)
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e63b183112ee0bfb6414a422ce6af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f500cf8b8b2b589f8267b737d2d9b57.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea093173f74807332e08bde42f25e22.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e411610769f8dd3ea8cf8dcba2c41d9.png)
您最近一年使用:0次
2017-12-26更新
|
1081次组卷
|
3卷引用:重庆市渝北区两江育才中学校2023-2024学年高一上学期期末模拟数学试题
3 . 在
中,角
,
,
所对的边分别为
,
,
,且
.
(1)求角
的值;
(2)若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/2ac63ef27877b3e4dc451e5aedcf6f8e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036b23c94e305faaa1283996edc5b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef9e1e927934f8ae7a2a60a18cfc763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
名校
4 . 某地区为了了解本年度数学竞赛成绩情况,从中随机抽取了
个学生的分数作为样本进行统计,按照
,
,
,
,
的分组作出频率分布直方图如图所示,已知得分在
的频数为20,且分数在70分及以上的频数为27.
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399561905553408/2399766145744896/STEM/919f660192b04c14ae65745212cf4f97.png?resizew=216)
(1)求样本容量
以及
,
的值;
(2)在选取的样本中,从竞赛成绩在80分以上(含80分)的学生中随机抽取2名学生,求所抽取的2名学生中恰有一人得分在
内的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a86a6ccc6968f95c9e26db5c4b80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8826cd3a88388c3896b1e429fabd437f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58d9a123e465dace224231f54ee94e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a40cf767fd2a684f2f1ed9216836792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a0dc3b0349c53d7bf36dfe97958cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58d9a123e465dace224231f54ee94e8.png)
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399561905553408/2399766145744896/STEM/919f660192b04c14ae65745212cf4f97.png?resizew=216)
(1)求样本容量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)在选取的样本中,从竞赛成绩在80分以上(含80分)的学生中随机抽取2名学生,求所抽取的2名学生中恰有一人得分在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a40cf767fd2a684f2f1ed9216836792.png)
您最近一年使用:0次
5 . 已知等差数列
中,首项
,
.
(1)求
的通项公式;
(2)若等比数列
满足
,
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3c41de954935a705c1452fa3b36e0e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4995fa0403e013d888c0935ebfe15024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c16771a3e64b8f084ee6cf89a02705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
6 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858e7184ae4b7d6fdc0a1c7a15c719ac.png)
(1)求曲线
在点
处的切线方程;
(2)当
时,
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858e7184ae4b7d6fdc0a1c7a15c719ac.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5008ab14c40abcc8e2c7d9ae543aacbb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec9ff3d82ba1c5f4bf4d217371ddee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bf3d68c327aff754c2a807b79c4095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2016-12-04更新
|
547次组卷
|
3卷引用:重庆市礼嘉中学2020-2021学年高二下学期期末数学试题