1 . 祖暅,字景烁,祖冲之之子,南北朝时代的伟大科学家.祖暅在数学上有突出的贡献,他在实践的基础上,于5世纪末提出下面的计算原理——祖暅原理:夹在两个平行平面之间的两个几何体,被平行于这两个平面的任意平面所截,如果截得的两个截面的面积总相等,那么这两个几何体的体积相等.请同学们用祖暅原理解决如下问题:如题图,有一个倒圆锥形容器,它的轴截面是一个正三角形,在容器内放一个半径为的铁球,再注入水,使水面与球正好相切(而且球与倒圆锥相切效果很好,水不能流到倒圆锥容器底部),然后将球取出,则这时容器中水的深度为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/54d51f85-4c7f-4fb0-bdda-2e5c960387c5.png?resizew=136)
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解题方法
2 . 如图1,直线
与x轴,y轴分别相交于A,B两点,将
绕点O逆时针旋转90°得到
,过点A,B,D的抛物线
叫做l的关联抛物线,而直线l叫做
的关联直线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/ef9d3ce4-d4b1-4552-a814-082583273cf8.png?resizew=458)
(1)若直线
,则抛物线
表示的函数解析式为________;若抛物线
,则直线l表示的函数解析式为______.
(2)求抛物线
的对称轴(用含m,n的代数式表示);
(3)如图2,若直线
,抛物线
的对称轴与
相交于点E,点F在l上,点Q在抛物线
的对称轴上.当以点C,E,Q,F为顶点的四边形是以
为一边的平行四边形时,求点Q的坐标;
(4)如图3,若直线
,G为
中点,H为
中点,连接
,M为
中点,连接
.若
,求直线l,抛物线
表示的函数解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a88699a9cab3fb5e061e722d1f60a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/ef9d3ce4-d4b1-4552-a814-082583273cf8.png?resizew=458)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90717234dbf965e8cb5f8fe2e53776da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef60818f89bebb4ed87db774a5149fd9.png)
(2)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
(3)如图2,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ec899da04f19dca04bba10ffc4358a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(4)如图3,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a163a3df8d98950645d7a249141b679d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc91a53e2534ce7034372b0add103eac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
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3 . 如图,在平面直角坐标系
中,过
外一点
引它的两条切线,切点分别为
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f798964a881ea48b2c79b7fd96ebd7.png)
,则称
为
的环绕点.
![](https://img.xkw.com/dksih/QBM/2021/8/2/2777681467408384/2782948712816640/STEM/0826976a-b1f6-4b0f-b7d9-ac20165ed90b.png?resizew=259)
(1)当
O半径为1时,
①在
中,
的环绕点是__________.
②直线
与
轴交于点
,与
轴交于点
,若线段
上存在
的环绕点,求
的取值范围;
(2)
的半径为1,圆心为
,以
为圆心,
为半径的所有圆构成图形
,若在图形
上存在
的环绕点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f798964a881ea48b2c79b7fd96ebd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b685bc5ff8d47424c0d4f2f8c08e58bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://img.xkw.com/dksih/QBM/2021/8/2/2777681467408384/2782948712816640/STEM/0826976a-b1f6-4b0f-b7d9-ac20165ed90b.png?resizew=259)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f4280e5155144bc68b74ecd9e3de45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180735d52856f4393e40e28e7fcc95bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c013c86ffcabc839b93c5725519c7fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c00653a92e7962ecc3a9cc1a4a49e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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4 . 如图,在菱形
中,
,
,
为
的中点,将
沿直线
翻折成
,连接
和
,
为
的中点,则在翻折过程中,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775425393975296/2776857769074688/STEM/17e6fa2d-8561-46af-870f-d6f6a0c2c43c.png?resizew=344)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e054544e4ece645f5e06c9d24a8b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775425393975296/2776857769074688/STEM/17e6fa2d-8561-46af-870f-d6f6a0c2c43c.png?resizew=344)
A.![]() |
B.![]() |
C.![]() ![]() ![]() |
D.当三棱锥![]() ![]() ![]() |
您最近一年使用:0次
2021-08-01更新
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1921次组卷
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4卷引用:江苏省宿迁市四校2019-2020学年高一下学期期末联考数学试题
江苏省宿迁市四校2019-2020学年高一下学期期末联考数学试题重庆市西南大学附属中学2021届高三下学期第四次月考数学试题(已下线)第8章 立体几何初步(压轴30题专练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(已下线)高一数学下学期期末精选50题(压轴版)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)
名校
5 . 地球仪是地理教学中的常用教具.如图1所示,地球仪的赤道面(与转轴垂直)与黄道面(与水平面平行)存在一个夹角,即黄赤交角,大小约为23.5°.为锻炼动手能力,某同学制作了一个半径为4cm的地球仪(不含支架),并将其放入竖直放置的正三棱柱
中(姿态保持不变),使地球仪与该三棱柱的三个侧面相切,如图2所示.此时平面
恰与地球仪的赤道面平行,则三棱柱
的外接球体积为___________ .(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1d0c436005a91b1a0a5f8d87d4bc6d.png)
![](https://img.xkw.com/dksih/QBM/2021/6/27/2751832374763520/2760016918478848/STEM/49fe51dd-4e3f-4171-b87d-605a0b3f8d25.png?resizew=447)
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2021-07-08更新
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1245次组卷
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3卷引用:广东省汕头市潮阳实验学校2021届高三上学期第一次月考数学试题
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6 . 已知三棱锥
的顶点P在底面的射影O为
的垂心,若
的面积
,
的面积
,
的面积
,满足
,且三棱锥
的外接球半径为3,则
的面积之和的最大值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16c359cc51ec0325c7c31f15c979e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0cbf0604c1a9bdb08cc54fa6821fa06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7f7d052456974eaf01abe712167e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b2ac52d6255d30ec7430fe23c809e7.png)
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2020-12-27更新
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1528次组卷
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3卷引用:江苏省南京市金陵中学2020-2021学年高三上学期12月阶段性测试数学试题
江苏省南京市金陵中学2020-2021学年高三上学期12月阶段性测试数学试题湖南省怀化市第三中学2020-2021学年高一下学期期中数学试题(已下线)第11讲空间直线、平面的垂直(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(原卷版)
7 . 已知正三棱锥
的底面是边长为6的正三角形,其外接球球
的表面积为
,且点
到平面
的距离小于球
的半径,
为
的中点,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2020/12/18/2616689632813056/2618436394057728/STEM/47941f76-7162-4214-9930-05893119e36e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178ec48ec6dec55778c74962a928d600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2020/12/18/2616689632813056/2618436394057728/STEM/47941f76-7162-4214-9930-05893119e36e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-12-20更新
|
2566次组卷
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4卷引用:陕西省2020-2021学年高三上学期教学质量检测测评卷一文科数学试题
陕西省2020-2021学年高三上学期教学质量检测测评卷一文科数学试题陕西省2020-2021学年高三上学期教学质量检测测评卷一理科数学试题辽宁省沈阳市小三校2022-2023学年高三上学期10月月考数学试题(已下线)专题7-2 立体几何压轴小题:角度与动点、体积(讲+练)-1
名校
解题方法
8 . 正四棱锥
的底面正方形边长是4,
是
在底面上的射影,
,
是
上的一点,
,过
且与
、
都平行的截面为五边形
.
![](https://img.xkw.com/dksih/QBM/2020/11/25/2600436185726976/2603603820740608/STEM/9af09dca-8b60-4b65-8787-240081425a51.png)
(1)在图中作出截面
(写出作图过程);
(2)求该截面面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634e91a3d04eb1b522444cb2378c05da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e588f65cab66cf2e5a11ee504024e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f48aa3096fb3db24874b1c6701a6ed.png)
![](https://img.xkw.com/dksih/QBM/2020/11/25/2600436185726976/2603603820740608/STEM/9af09dca-8b60-4b65-8787-240081425a51.png)
(1)在图中作出截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f48aa3096fb3db24874b1c6701a6ed.png)
(2)求该截面面积.
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2020-11-29更新
|
2293次组卷
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2卷引用:福建省莆田第一中学2020-2021学年高二上学期期中考试数学试题
名校
9 . 在长方体
中,
,
,点
在正方形
内,
平面
,则三棱锥
的外接球表面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd13ddeabb00d3bb637075e0e420bf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadc76eecc537dec6a34ee1b2bc722c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4e7552a39c412d882766dbcd7eeb69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3204721e25d0db954f67b9a866c8c5d.png)
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2020-11-29更新
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9卷引用:安徽省合肥市第六中学2020-2021学年高三上学期期中理科数学试题
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10 . 已知点
到
的距离是点
到
的距离的2倍.
(1)求点
的轨迹方程;
(2)若点
与点
关于点
对称,点
,求
的最大值;
(3)若过
的直线与第二问中
的轨迹交于
,
两点,试问在
轴上是否存在点
,使
恒为定值?若存在,求出点
的坐标和定值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e414c3f13e0e28fe2250bf88e33d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d436fc4cde0f6490b25bdd6e476332ed.png)
(3)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8649ce18c628d0e03e72cef541f8284f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d405c7e1ed6ddac33126b8c1cb511b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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7卷引用:四川省内江市资中县第二中学2020-2021学年高二上11月月考理科试题