解题方法
1 . 已知某地区烟民的肺癌发病率为
,先用低剂量药物
进行肺癌䈐查,检查结果分阳性和阴性,阳性被认为是患病,阴性被认为是无病.医学研究表明,化验结果是存在错误的,化验的准确率为
,即患有肺癌的人其化验结果
呈阳性,而没有患肺癌的人其化验结果
呈阴性.则该地区烟民没有患肺癌且被检测出阳性的概率为__________ ;现某烟民的检验结果为阳性,请问他患肺癌的概率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edb1e0c3e2fb29b0b35d51d22a5710d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4091320ff4a500eeb76dfb1ee2db8e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4091320ff4a500eeb76dfb1ee2db8e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4091320ff4a500eeb76dfb1ee2db8e86.png)
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2 . 设椭圆
:
的上顶点为
,下顶点为
,焦距与短轴长相等,过
点的直线
与椭圆
交
点,点
不与上、下顶点重合.
(1)求离心率
;
(2)设点
与点
关于
轴对称,设直线
斜率为
,直线
的斜率为
,求
的值;
(3)若直线
过右焦点,且
,求椭圆
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求离心率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d405fe7e7fe6dacdcb912a46e67d8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
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3 . 下列命题正确的个数为( )
①长方体
中,
,
,则异面直线
与
所成角的余弦值为
;
②对于命题:
,
,则命题
的否定:
,
;
③ “
”是“
”的充分不必要条件;
④已知
,
,
,且
,则
的值为
.
①长方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64e76a4c1e5934f51cdca2ffbc8313f.png)
②对于命题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02491f9709f00a1bc169278fbe01f576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd0737f120bf1bae03b9abbae79e4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654120ab17a29dbae5cf9c43860846ca.png)
③ “
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8adaa3d42ccb9d59e0d6b6f60bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5553e7018e6e14755bbcda2b657c7b03.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b566395b41fc587143d533f9756024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fc7939259f787ce6d557e59bb3dc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b1ba2e2dbab8c7bec0dad6b63fcc5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1e517c0d481c5d62707ed3f6435d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
A.0 | B.1 | C.2 | D.3 |
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解题方法
4 . “数学在晚旁,月也在晚旁.”是时候为《晚旁》写一句诗、做一枚徽标了.“晩旁”徽标是借两个圆设计而成,其状如月(如图1).已知
,其中
.如图
为圆
与
的交点,若弦
将圆
分为长度之比为
的两段弧,则组成“月亮”的两段弧长之比为__________ .(请写出长度较小的弧与长度较长的弧的长度之比,即该比值小于1.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109a4a3c69477302a8dd701a2b408662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4689e7492d26d4f77a0c74d4444550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/bfce779f-2379-4245-9f8f-528b91428588.png?resizew=267)
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2023-12-03更新
|
380次组卷
|
3卷引用:天津市南开中学2023-2024学年高二上学期第二次学情调查数学试卷
名校
解题方法
5 . 若关于
的方程
的两个实数根
,
,集合
,
,
,
,则关于
的不等式
的解集为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f230deee251f0ccff0b421b6ab650ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ecff12d8a212b2eab4608492065224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea37182a691ab32f621f9357f003e6c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320bacea0d7ca0c96652ce537e9b7c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a98f56813c3ea95d8c7fc0472715b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-10-18更新
|
190次组卷
|
2卷引用:天津市南开中学2023-2024学年高一上学期第一次学情调查数学试题
解题方法
6 . 如图在正方形
中,
为
中点,设
.
(1)求
;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6293a2528570eda7fef7c784efc7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a3c616a942318302c75de0c1cb912bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/2/986dafc8-9acb-4280-953e-72c13b92af3a.png?resizew=161)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af1a331a68b888bef4469700f08adba.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fae886539d52bddc6f7b45332d4018c.png)
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7 . 下面命题中正确的有__________ .
①直线
的斜率为
;
②直线
与
垂直的充要条件是斜率满足
;
③截距相等的直线都可以用方程
表示;
④
若
,则四点P,A,B,C必共面;
⑤
为直角三角形的充要条件是
;
⑥若
为空间的一个基底,则
,
,
构成空间的另一基底;
⑦在空间中,直线
的方向向量
,平面
的一个法向量
,若
,则
.
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b6e44dd054b54f89e7c237eb1428da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f7cb8e59593788135eeb7db4aaa5d4.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4cc51d393a94365f7008de5eae8879.png)
③截距相等的直线都可以用方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087af7a99d3e752994c8081970f5050d.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02afb6613b182e45f56cd05e5fe838c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457721171986ec01cca634ae94f04a6f.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a2d2b2b666b03344637a73e05f5226.png)
⑥若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5401d7f4a297c8b097e74bdebaaa8570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e3921e92ab4a807bfb6e793240d879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf598b46aeef4c44c259a101a9e29e2.png)
⑦在空间中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb0cf2f475d1997eeadb34a641867b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff259ba50b735db32427fc0ebfbdfdaf.png)
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解题方法
8 . 已知点
,
,
为坐标原点.若
关于直线
的对称点为
,延长
到
,且
.已知直线
经过点
,则直线
的倾斜角为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a682ceca64f8b53216746fb76f3e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5137f9ddb2ae0ccdf33aeef59735cd5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb99c9a026be17b229037e6343976f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2023高三·全国·专题练习
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解题方法
9 . 下列命题不正确的是( )
①空间中任意三个不共面的向量都可以作为基底.
②直线的方向向量是唯一确定的.
③若直线a的方向向量和平面α的法向量平行,则a
α.
④在空间直角坐标系中,在Oyz平面上的点的坐标一定是(0,b,c).
⑤若
,则
是钝角.
①空间中任意三个不共面的向量都可以作为基底.
②直线的方向向量是唯一确定的.
③若直线a的方向向量和平面α的法向量平行,则a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
④在空间直角坐标系中,在Oyz平面上的点的坐标一定是(0,b,c).
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084305253490e6587aba68e67dcb7323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7be4359335d6e4f961bf1913d47b904.png)
A.①③④ | B.②③⑤ | C.③④⑤ | D.①②④ |
您最近一年使用:0次
2023-09-22更新
|
550次组卷
|
3卷引用:天津市嘉诚中学2023-2024学年高二上学期阶段测试二数学试卷
天津市嘉诚中学2023-2024学年高二上学期阶段测试二数学试卷(已下线)第七章 立体几何与空间向量 第五节 空间向量与线、面位置关系 讲湖北省襄阳市第一中学2023-2024学年高二上学期10月月考数学试题
名校
解题方法
10 . 某医疗仪器上有
、
两个易耗元件,每次使用后,需要更换
元件的概率为
,需要更换
元件的概率为
,则在第一次使用后就要更换元件的条件下,
、
两个元件都要更换的概率是( )
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7412fd1be21e4eaf388963a82ac2b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec818fc0754296163206e1e8870f9e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-09-06更新
|
1377次组卷
|
6卷引用:天津市和平区耀华中学2024届高三上学期期末数学试题
天津市和平区耀华中学2024届高三上学期期末数学试题(已下线)第四节 事件的相互独立性与条件概率、全概率公式(核心考点集训) 一轮复习点点通(已下线)4.1.1 条件概率(分层练习)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第二册)安徽省安庆市第一中学2022届高三第三次模拟考试理科数学试题 (已下线)考点巩固卷24 古典概型、相互独立、条件概率及全概率公式(七大考点)(已下线)第06讲 事件的相互独立性、条件概率与全概率公式(练习)