1 . 如图,在平面直角坐标系中,
和
是
轴上关于原点对称的两个点,过点
倾斜角为
的直线
与抛物线
交于
两点,且
.
为
的焦点,求证:
;
(2)过点
作
轴的垂线,垂足为
,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08136e6bc876f29a13d1204d9d621db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea0b6471289760543596f5f45aa43ae.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14cc1572ca21da2e3271484f127a5094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2024-06-03更新
|
506次组卷
|
3卷引用:山西省临汾市2024届高三下学期考前适应性训练(三)数学试题
解题方法
2 . 某导弹试验基地,对新研制的
型导弹进行最后确定试验.
(1)据以往多次试验,
型导弹每次击中空中目标的概率为
.用该导弹对目标进行连续射击,若击中2次,则目标被击落,射击停止;若射击达到5次,不管目标击落与否,则结束试验.求射击次数
的分布列并计算其期望;
(2)据以往多次试验,
型导弹每次击中空中目标的概率为
.用该导弹对目标进行连续射击,若击中1次,则目标被击落,射击停止.请完成以下关于射击次数
的分布列,并证明:
.
(参考公式:若
,则
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)据以往多次试验,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)据以往多次试验,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c624cacd18c986d5268935b1faab38ba.png)
![]() | 1 | 2 | 3 | … | ![]() | … |
![]() | … | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b70d4a3fc3e01b5a6358cf4e57578e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc9b039c2507ad25dc25c6b039da7c1.png)
您最近一年使用:0次
3 . 如图所示,在圆锥内放入两个大小不同的球
,使得它们分别与圆锥的侧面和平面
相切,两个球分别与平面
相切于点
,丹德林(
)利用这个模型证明了平面
与圆锥侧面的交线为椭圆,
为此椭圆的两个焦点,这两个球也称为Dandelin双球.若平面
截圆锥得的是焦点在
轴上,且离心率为
的椭圆,圆锥的顶点
到椭圆顶点
的距离为
,圆锥的母线
与椭圆的长轴
垂直,圆锥的母线与它的轴的夹角为
.
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901382638026752/2916878243422208/STEM/0af4ee06-4e6d-49ef-b130-9fcb1290de6a.png?resizew=175)
(1)求椭圆的标准方程;
(2)过右焦点
的直线与椭圆交于A,B两点,A,B中点为D,过点F2的直线MF2与AB垂直,且与直线l:
交于点M,求证:O,D,M三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e356cd40f890a1bb033ad1a348e4009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f98254a6193566587a70c7d95fdabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a1e056d7b79d075a93d2c9a38066bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f98254a6193566587a70c7d95fdabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fbbc8f521edab89a7e373287bcfbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca2bdb61cd094342cf80f9f6f863c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901382638026752/2916878243422208/STEM/0af4ee06-4e6d-49ef-b130-9fcb1290de6a.png?resizew=175)
(1)求椭圆的标准方程;
(2)过右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
您最近一年使用:0次
2022-02-15更新
|
526次组卷
|
3卷引用:山西省临汾市2022届高三高考考前适应性训练(一)数学(文)试题
山西省临汾市2022届高三高考考前适应性训练(一)数学(文)试题新疆喀什地区岳普湖县2022届高三第一次模拟考试数学(文)试题(已下线)第六章 突破立体几何创新问题 专题一 跨学科交汇问题 微点3 跨学科交汇问题综合训练【培优版】
4 . 山西面食历史悠久,源远流长,称为“世界面食之根”.临汾牛肉丸子面、饸饹面是我们临汾人喜爱吃的面食.调查资料表明,某学校在每周一有1000名学生选择面食,餐厅的面食窗口在每周一提供牛肉丸子面和饸饹面两种面食.凡是在本周一选择牛肉丸子面的学生,下周一会有
改选饸饹面;而选择饸饹面的学生,下周一会有
改选牛肉丸子面.用
分别表示在第n个周一选择牛肉丸子面和饸饹面的人数,且
.
(1)证明:数列
是常数列;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23466fd31d0666cb9f65dced41188359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4ec5b9d2f5dbd6ec1cac34dbd8e547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55e03428497ac0ea2aa80fe5bdcd939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd14026dbddfd8dbf76fc881cb8403e.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac1a48ac7e749d68ac24f921b3784b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da32720acf4f322fea5b0c23eef23045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9a0d7150fb24be3e28ef7f0e18be93.png)
您最近一年使用:0次