名校
1 . 已知抛物线
的焦点为F,准线为l,A为C上的点,过A作l的垂线.垂足为B,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb74fdc5724514d0a8a01a7ff420309.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71178bbca9e0ad56ab4582608afce582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb74fdc5724514d0a8a01a7ff420309.png)
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2 . 如图1,已知等边
的边长为3,点M,N分别是边AB,AC上的点,且满足
,
,如图2,将
沿MN折起到
的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/77e052bf-8690-4e8e-82aa-c88d77a481b6.png?resizew=537)
(1)求证:平面
平面BCNM;
(2)若四棱锥
的体积为
,求平面
和
平面的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1be45533eaf815eb4b5ffdcb377accf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48bb59034583ec7aa9ecadff722c1d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e7040c2fd8a163d71e35805775feb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/77e052bf-8690-4e8e-82aa-c88d77a481b6.png?resizew=537)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca178574ce663e423e3ea16b40ee1fb6.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05ceb6974c84f6728e420173edc10bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e57f00c8225a33458a6b62bff0dcc16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9b83d5f52042846158fa921d7e1d3e.png)
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解题方法
3 . 正方体
的棱长为1,E、F、G分别为
的中点,有下述四个结论,其中正确的结论是___________ .
![](https://img.xkw.com/dksih/QBM/2022/6/28/3011138861490176/3011893235122176/STEM/f175681640a24ac48ee7ec44e9132e73.png?resizew=199)
①点C与点B到平面
的距离相等;
②直线
与平面
平行;
③平面
截正方体所得的截面面积为
;
④直线
与直线
所成的角的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473ce0e22c4edc6ef768e0c12f59e483.png)
![](https://img.xkw.com/dksih/QBM/2022/6/28/3011138861490176/3011893235122176/STEM/f175681640a24ac48ee7ec44e9132e73.png?resizew=199)
①点C与点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04777f3f4661fa1c08a1cc0dfb807c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
③平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4700efcb84c4027ce7a50af0d5212fc.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04777f3f4661fa1c08a1cc0dfb807c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60e55e24dd6c296d71d773af418685a.png)
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解题方法
4 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2b8dae45cd30a752aedb1ca66c30a.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885cf4b0d7936da411a721d35ca2351d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2b8dae45cd30a752aedb1ca66c30a.png)
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5 . 以直角坐标系的原点O为极点,x轴的非负半轴为极轴建立极坐标系,曲线C的参数方程为
(t为参数),直线l的极坐标方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f610e0a23e550675622ca0d4081333.png)
(1)已知点
在曲线C上,求a的值;
(2)设点P为曲线C上一点,求点P到直线l距离的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29d9f47635bf5cb3e7e80022b908407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f610e0a23e550675622ca0d4081333.png)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88960e6fb3b24aed08e478fb5bf118d2.png)
(2)设点P为曲线C上一点,求点P到直线l距离的最小值.
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6 . 已知函数
.
(1)判断
的零点个数;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7145f42b88fc1373b1ee8e61321161.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69742314221102400bb6ba60fa3c808.png)
您最近一年使用:0次
2022-06-28更新
|
485次组卷
|
3卷引用:江西省名校2022届高三一轮复习验收考试数学(理)试题
名校
7 . 若
,则“
”是“
”的( )条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec307143b4bf45106369f256a796d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1a2cbcc1fb41a01668f1808267df4d.png)
A.充分不必要 | B.必要不充分 |
C.充要 | D.既非充分也非必要 |
您最近一年使用:0次
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8 . 某高中组织了1000名学生参加线上新冠肺炎防控知识竞答活动,现从参与答题的男生、女生中分别随机抽取20名学生的得分情况(满分100分).得到如下统计图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/6f09bb93-9941-40e2-b6f8-827f3f309c18.png?resizew=270)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/dc36f865-c740-430d-8266-aad460924787.png?resizew=270)
(1)若从这40名成绩位于
的学生中随机抽取2人,记成绩在
的人数为X,求X最有可能的取值;
(2)若此次知识竞答全校学生的成绩Y近似服从正态分布
.若学校要对成绩不低于95分的学生进行表彰,请估计获得表彰的学生人数.
附:若随机变量
,则
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/6f09bb93-9941-40e2-b6f8-827f3f309c18.png?resizew=270)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/dc36f865-c740-430d-8266-aad460924787.png?resizew=270)
(1)若从这40名成绩位于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689f6a834818ed39e768255255c7a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a86a6ccc6968f95c9e26db5c4b80d.png)
(2)若此次知识竞答全校学生的成绩Y近似服从正态分布
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbf589ef9c89aed07d93ae5a20fe344.png)
附:若随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25296fea32b47b679864c471e90c04b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cb2e14302ce73b0dc07bf37236f82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23a25fdd46f9ccba196b02141f2fb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d9dd414e88b9a8e9b2affff94a770f.png)
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2022-06-19更新
|
654次组卷
|
4卷引用:江西省景德镇市2022届高三第三次质检数学(理)试题
江西省景德镇市2022届高三第三次质检数学(理)试题安徽省六安市舒城中学2022届高三下学期仿真模拟(三)理科数学试题(已下线)专题50:正态分布-2023届高考数学一轮复习精讲精练(新高考专用)(已下线)6.6 分布列基础(精讲)
名校
解题方法
9 . 如图,三角形
的内角
,
,
所对的边分别为
,
,
,
.
(1)求
.
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/a9aa0580d0ddae2c680b6742631c19e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/b479373f-21ce-4889-81e8-bc97989e43d3.png?resizew=170)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2395720e6d6aeb7efdcd8e921849acf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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2023-08-09更新
|
975次组卷
|
6卷引用:江西省南昌市实验中学2022届高三第一次模拟考试数学(理)试题
名校
10 . 已知集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a74e4f3ce7e04f63420eb3b6d388fe.png)
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a74e4f3ce7e04f63420eb3b6d388fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1578113a52691ddc2f37e70c16b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-06-13更新
|
2561次组卷
|
14卷引用:江西省九大名校2022届高三3月联考数学(理)试题
江西省九大名校2022届高三3月联考数学(理)试题黑龙江省大庆实验中学实验二部2022届高考得分训练(二)文科数学试卷2022届黑龙江省大庆实验中学实验二部高考得分训练数学理科试卷二(5月模拟二)天津市静海区第一中学2022届高三下学期5月考前学业能力调研数学试题天津市南开中学2022届高三下学期统练19数学试题黑龙江省牡丹江市第一高级中学2022-2023学年高一上学期10月月考数学试题天津外国语大学附属外国语学校2022-2023学年高三下学期统练22数学试题天津市新华中学2023届高三下学期统练(3)数学试题(已下线)第07讲:第一章 集合与常用逻辑用语、不等式、复数(测)(提高卷)-2023年高考数学一轮复习讲练测(新教材新高考)(已下线)易错点01 集合天津市实验中学2022-2023学年高三上学期期末数学试题(已下线)专题1-1 集合与常用逻辑用语-1天津市双菱中学2022届高三下学期开学考试数学试题天津市耀华中学2023届高三下学期大统练5数学试题