2021高三·全国·专题练习
名校
解题方法
1 . 如图所示,在四棱锥
中,
,平面
平面
,
,
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/80223d89-2714-4e6c-89d8-a08d5baa810c.png?resizew=166)
(1)求证:平面
平面
;
(2)设直线
与平面
所成的角为
,求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3e2bed5ce5fe466395d2f5743d335b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.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/138979d89545a7a4c1ebe767f8115648.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/80223d89-2714-4e6c-89d8-a08d5baa810c.png?resizew=166)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c26f7a112f96b85deceae436a21388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745e0525a41fe2e2a7739c75a942290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
您最近一年使用:0次
2021-01-19更新
|
168次组卷
|
3卷引用:黑龙江省牡丹江市第一高级中学2021届高三上学期期末数学(理)试题
黑龙江省牡丹江市第一高级中学2021届高三上学期期末数学(理)试题(已下线)大题专项训练16:立体几何(二面角)-2021届高三数学二轮复习广东省肇庆市高要区第二中学2020-2021学年高一下学期段考二数学试题
名校
解题方法
2 . 如图,在
中,
,
,
边上的中线长之和等于39.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/4db4a309-1a13-4a52-805c-b1588feb6191.png?resizew=132)
(1)求
重心
的轨迹方程;
(2)若M是(1)中所求轨迹上的一点,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86cf51378ccec9eae5723f343ca7ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ecbae225256ba1ad0f3a25dd64c1f0c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/4db4a309-1a13-4a52-805c-b1588feb6191.png?resizew=132)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若M是(1)中所求轨迹上的一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ac80e0dc929174bb1dc530113579ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
您最近一年使用:0次
2021-01-17更新
|
58次组卷
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2卷引用:黑龙江省嫩江市高级中学2020-2021学年高二上学期期末考试数学(文)试题
名校
3 . 已知命题P函数
在定义域上单调递减;命题Q不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24cc75fc7e769410876213be14d10c8.png)
对任意实数
恒成立.若
是真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8650068f8c49e0b9cded33045e37d658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24cc75fc7e769410876213be14d10c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5195de7b61d61ee7b9171b8c97f3f6df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429d9cd4fe4a885ac06831a7b8eb3dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2021-01-17更新
|
111次组卷
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2卷引用:黑龙江省嫩江市高级中学2020-2021学年高二上学期期末考试数学(文)试题
4 . 已知点
在抛物线
上,
为抛物线
的焦点,
.
(1)求抛物线
的方程;
(2)过点
且斜率为
的直线
交抛物线
于
,
两点,过点
且与直线
垂直的直线
交抛物线
于
,
两点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd1b0b1017a67293acca4b7c6529c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf92a1ba410263d4f68b7e0432b19aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b7937d2541afc6351464650727a8fc.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45d4785a48c4e9641450e9ee2822df3.png)
您最近一年使用:0次
5 . 如图,在三棱柱
中,侧棱垂直于底面,
,
,
,
.点
在侧棱上
,且
.
![](https://img.xkw.com/dksih/QBM/2021/1/5/2629578568843264/2632556496429056/STEM/5569816f-19c0-4eed-bb1f-e0fac9f8f45f.png?resizew=220)
(1)求证:
平面
;
(2)设
为
的中点,求六面体
体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32778bb52afe4f2b345e9836c54e3c94.png)
![](https://img.xkw.com/dksih/QBM/2021/1/5/2629578568843264/2632556496429056/STEM/5569816f-19c0-4eed-bb1f-e0fac9f8f45f.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b92b5f95559de9e03ac5f5eb99d8f2eb.png)
您最近一年使用:0次
名校
解题方法
6 . 已知椭圆
的中心在坐标原点,焦点在
轴上,左顶点为
,离心率为
.
(1)求椭圆
的标准方程;
(2)斜率为1的直线
与椭圆
相交于
,
两点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)斜率为1的直线
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
您最近一年使用:0次
2021-01-07更新
|
1373次组卷
|
6卷引用:黑龙江省哈尔滨市第六中学2020-2021学年高二上学期期末考试数学(文)试题
名校
7 . 在四棱锥
中,底面四边形
为直角梯形,侧面
为等边三角形,
、
分别为
、
的中点,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/4/2628780859146240/2631051660673024/STEM/b9b156b1-25d6-4654-a902-465400383c6e.png)
(1)求证:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7442b64b37f685bc3ae88ff450c1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8067cc458cf12887177487c3cfb9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://img.xkw.com/dksih/QBM/2021/1/4/2628780859146240/2631051660673024/STEM/b9b156b1-25d6-4654-a902-465400383c6e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
您最近一年使用:0次
2021-01-07更新
|
1117次组卷
|
3卷引用:黑龙江省哈尔滨市第六中学2020-2021学年高二上学期期末考试数学(文)试题
解题方法
8 . 已知椭圆
的中心在原点,焦点在
轴上,离心率为
,短轴长为4.
(1)求椭圆
的标准方程;
(2)设
,过椭圆
左焦点
的直线
交
于
两点,若对满足条件的任意直线
,不等式
恒成立,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c153027427477bcd0a7228b14ce96cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be54e0222454e51b2139955eee85ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
名校
9 . 已知p:函数f(x)=(a﹣m)x在R上单调递减,q:关于x的方程x2﹣2ax+a2﹣1=0的两根都大于1.
(1)当m=5时,p是真命题,求a的取值范围;
(2)若p为真命题是q为真命题的充分不必要条件,求m的取值范围.
(1)当m=5时,p是真命题,求a的取值范围;
(2)若p为真命题是q为真命题的充分不必要条件,求m的取值范围.
您最近一年使用:0次
2021-04-20更新
|
800次组卷
|
16卷引用:黑龙江省大庆铁人中学2020-2021学年高二下学期期末考试数学(理)试题
黑龙江省大庆铁人中学2020-2021学年高二下学期期末考试数学(理)试题广西玉林市第十一中学2021-2022学年高二上学期期末模拟考试数学(理)试题广西玉林市第十一中学2021-2022学年高二上学期期末模拟考试数学(文)试题云南省楚雄州2019-2020学年高二上学期期末数学(理)试题河北省部分重点中学2019-2020学年高二上学期期末数学试题河北省邯郸市2019-2020学年高二上学期期末数学试题河北省2019-2020学年高二上学期期末数学试题(已下线)第1章 常用逻辑用语(基础卷)-2020-2021学年高二数学课时同步练(苏教版选修2-1)广西玉林市第十一中学2019-2020学年高二数学(文)期末试题云南省楚雄州2019-2020学年高二上学期期末数学(文)试题四川省仁寿第一中学校南校区2022-2023学年高一上学期期末考试数学试题福建省福州市第十中学2020-2021学年高一12月月考数学试题(已下线)单元卷 常用逻辑用语(基础卷)-2020-2021学年高二数学课时同步练(苏教版选修1-1)(已下线)专题1.3《集合与常用逻辑用语》单元测试卷 - 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)第02节 命题及其关系、充分条件与必要条件(好题帮)-备战2023年高考数学一轮复习考点帮(全国通用)江西省宜春市宜丰县宜丰中学2022-2023学年高一下学期开学考试数学试题
名校
解题方法
10 . 如图,在四棱锥
中,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/8aaa1af2-dd6f-4574-932e-87bce56276c7.png?resizew=197)
(1)求证:平面
平面
;
(2)
长为何值时,直线
与平面
所成角最大?并求此时该角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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(1)求证:平面
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(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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您最近一年使用:0次
2020-11-19更新
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1324次组卷
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7卷引用:黑龙江省大庆市铁人中学2020-2021学年高二上学期期末考试数学(理)试题