1 . 已知四棱锥
的底面
为正方形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
上面
且
.
为
的中点.
(1)求证:
面
;
(2)求直线
与平面
所成角的余弦值.
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb178784aa857d4d4683e650273f054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/2018/1/16/1861846903750656/1863277662748672/STEM/108ffe528d4e42f2948f5af32d187ce8.png?resizew=231)
您最近一年使用:0次
名校
2 . 在平面直角坐标系中,动点
到两点
的距离之和等于4,设点
的轨迹为曲线
,直线
过点
且与曲线
交于
两点.
(Ⅰ)求曲线
的方程;
(Ⅱ)
的面积是否存在最大值,若存在,求出
的面积的最大值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5870327dda4e83f05a308d4e1d56cc45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c2c1fb76064ec624712cd818f07e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(Ⅰ)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
您最近一年使用:0次
2018-01-03更新
|
613次组卷
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2卷引用:黑龙江省大庆市实验中学2020-2021学年高二下学期期末考试数学(理科)试题
12-13高三上·山东青岛·期末
名校
3 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的离心率为
,椭圆短轴的一个端点与两个焦点构成的三角形的面积为
,直线l的方程为:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae077b198c3e6a891ca7c5eb6d53482a.png)
(Ⅰ)求椭圆
的方程;
(Ⅱ)已知直线l与椭圆
相交于
、
两点
①若线段
中点的横坐标为
,求斜率
的值;
②已知点
,求证:
为定值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333af6f9aa2391b81882eef6040a78b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae077b198c3e6a891ca7c5eb6d53482a.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)已知直线l与椭圆
![](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)
①若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
②已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258d58540143498fc24b8e7ce4da2121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cd639d381fb8f5675d8528ef19e0ae.png)
您最近一年使用:0次
2019-01-30更新
|
503次组卷
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12卷引用:黑龙江省大庆中学2019-2020学年高二上学期期末考试数学(文)试题
黑龙江省大庆中学2019-2020学年高二上学期期末考试数学(文)试题(已下线)2012届山东省青岛市高三上学期期末考试文科数学(已下线)2012-2013学年湖南省益阳市一中高二上学期期末考试文数学试卷2016-2017学年广东省揭阳市第一中学高二上学期期末考试数学(文)试卷(已下线)2012届北京高考模拟系列试卷文科数学试卷一(已下线)2013届北京市东城区高三12月联考理科数学试卷(已下线)2013-2014学年福建晋江季延中学高二上学期期中考试文数学试卷2016届贵州省贵阳市一中高三第五次月考理科数学试卷黑龙江省哈尔滨师范大学附属中学2017-2018学年高二10月月考数学(理)试题黑龙江省哈尔滨市哈尔滨师范大学附属中学2017-2018学年高二10月月考数学(文)试题江苏省苏州市第五中学校2018届高三上学期期初考试数学(文)试题天津市实验中学滨海学校2021-2022学年高二上学期期中数学试题
名校
4 . 已知
,设
:实数
满足
,
:实数
满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae018fde08edf0539089f98c17e11ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eabe5d1c6c48318c18afa38664c52f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d6db2438ed3e2b138adac5e9492ebd.png)
(1)若,且
为真,求实数
的取值范围;
(2)若是
的充分不必要条件,求实数
的取值范围.
您最近一年使用:0次
2017-07-09更新
|
1574次组卷
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6卷引用:【全国百强校】黑龙江省大庆实验中学2017-2018学年高二下学期期末考试数学(文)试题
【全国百强校】黑龙江省大庆实验中学2017-2018学年高二下学期期末考试数学(文)试题广东省中山市2016-2017学年高二下学期期末统一考试数学(文)试题【全国百强校】黑龙江省大庆实验中学2018-2019学年高二上学期期中考试数学(文)试题(已下线)1.4.3+含有一个量词的命题的否定(重点练)-2020-2021学年高二数学(文)十分钟同步课堂专练(人教A版选修1-1)(已下线)1.4.3+含有一个量词的命题的否定(重点练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-1)(已下线)1.4 (分层练)充分条件与必要条件-2021-2022学年高中数学必修第一册课时解读与训练(人教A版2019)
5 . 已知离心率为
的椭圆
过点
,点
分别为椭圆的左、右焦点,过
的直线
与
交于
两点,且
.
(1)求椭圆
的方程;
(2)求证:以
为直径的圆过坐标原点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6b94e42869013745050aba059b58dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b062588511a1b6878389468b04ae5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6d3ffa5d903b191ea2bcd490804fae.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求证:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2017-04-17更新
|
411次组卷
|
2卷引用:黑龙江省大庆中学2016-2017学年高二下学期期末考试数学(文)试题
名校
解题方法
6 . 如图已知椭圆
:
的离心率为
,以椭圆的左顶点
为圆心作圆
:
,设圆
与椭圆
交于点
与点
.
![](https://img.xkw.com/dksih/QBM/2017/3/19/1647359350513664/1652867734134784/STEM/1357658caae349b2a2141dbb2e2d2c17.png?resizew=257)
(Ⅰ)求椭圆
的方程;
(Ⅱ)设点
是椭圆
上异于
、
的任意一点,且直线
、
分别与
轴交于点
、
,
为坐标原点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/704778c5c3284c1190ff6cb0e4bcf5d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2017/3/19/1647359350513664/1652867734134784/STEM/1357658caae349b2a2141dbb2e2d2c17.png?resizew=257)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37aa696544881fcd3fe2d57106f51573.png)
您最近一年使用:0次
2017-03-11更新
|
1017次组卷
|
3卷引用:黑龙江省大庆中学2017-2018学年高二上学期期末考试数学(理)试题
7 . 如图,在底面是正方形的四棱锥
面ABCD,BD交AC于点E,F是PC中点,G为AC上一点.
(1)求证:
;
(2)确定点G在线段AC上的位置,使FG//平面PBD,并说明理由;
(3)当二面角
的大小为
时,求PC与底面ABCD所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a1c291f44afb96922096b93cb9d24e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c799d3d37ed64c9c74c0d3d932cd3f3f.png)
(2)确定点G在线段AC上的位置,使FG//平面PBD,并说明理由;
(3)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://img.xkw.com/dksih/QBM/2018/3/9/1898492046327808/1906173459415040/STEM/5e7ee2759f67420e841fb496f11c09ef.png?resizew=215)
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2018-03-20更新
|
907次组卷
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15卷引用:2011—2012学年度黑龙江大庆实验中学高二上学期期末考试理科数学试卷
(已下线)2011—2012学年度黑龙江大庆实验中学高二上学期期末考试理科数学试卷福建省莆田第一中学2017-2018学年高一上学期期末考试数学试题(已下线)北京市丰台区2010届高三一模考试(数学理)(已下线)2010年贵州省遵义市高三考前最后一次模拟测试数学(理)试题(已下线)吉林省实验中学2010年高三年级第八次模拟考试数 学 试 题(理)(已下线)2011届辽宁省沈阳二中高三第四次模拟考试理科数学(已下线)2012届浙江省台州中学高三上学期期中考试理科数学试卷(已下线)2013届广东省惠阳一中实验学校高三9月月考理科数学试卷(已下线)2013届安徽省泗县双语中学高三最后压轴卷理科数学试卷(已下线)2014届山东省东营市高三4月统一质量检测考试理科数学试卷重庆一中2021届高三高考数学押题卷试题(一)江苏省西安交通大学苏州附属中学2021-2022学年高二10月份第一次自主检测数学试题江苏省西安交通大学苏州附属中学2021-2022学年高二上学期10月第一次自主检测数学试题重点题型训练13:第6章平行关系、垂直关系-2020-2021学年北师大版(2019)高中数学必修第二册第3章 空间向量与立体几何测试题 -2021-2022学年高二上学期数学北师大版(2019)选择性必修第一册
名校
8 . 已知椭圆
:
的四个顶点组成的四边形的面积为
,且经过点
.
![](https://img.xkw.com/dksih/QBM/2019/3/23/2166836469366784/2168057961062400/STEM/430bea2feb9549dfb1c6dc293ca12e2e.png?resizew=193)
(1)求椭圆
的方程;
(2)若椭圆
的下顶点为
,如图所示,点
为直线
上的一个动点,过椭圆
的右焦点
的直线
垂直于
,且与
交于
,
两点,与
交于点
,四边形
和
的面积分别为
,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8530b8e246a9a5ec9fe3b9c347d5a.png)
![](https://img.xkw.com/dksih/QBM/2019/3/23/2166836469366784/2168057961062400/STEM/430bea2feb9549dfb1c6dc293ca12e2e.png?resizew=193)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若椭圆
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2016-12-04更新
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8卷引用:黑龙江省大庆中学2019-2020学年高二上学期期末考试数学(理)试题
9 . 已知命题
:存在实数
,使方程
有两个不等的负根;命题
:存在实数
,使方程
无实根.若“
”为真,“
”为假,求
的取值范围.
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名校
10 . 抛物线顶点在原点,焦点在x轴上,且过点(4,4),焦点为F.
(1)求抛物线的焦点坐标和标准方程;
(2)P是抛物线上一动点,M是PF的中点,求M的轨迹方程.
(1)求抛物线的焦点坐标和标准方程;
(2)P是抛物线上一动点,M是PF的中点,求M的轨迹方程.
您最近一年使用:0次
2016-12-04更新
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10卷引用:黑龙江省大庆中学2019-2020学年高二上学期期末考试数学(文)试题
黑龙江省大庆中学2019-2020学年高二上学期期末考试数学(文)试题2015-2016学年福建省漳州市长泰一中高二上学期期末文科数学试卷2016-2017学年内蒙古赤峰二中高二理上月考一数学理试卷2016-2017学年内蒙古赤峰二中高二文上月考一数学试卷黑龙江省哈尔滨市第六中学2019-2020学年高二上学期10月份阶段性总结数学(文)试题安徽省滁州市凤阳县第二中学2019-2020学年高二上学期期中数学(理)试题安徽省滁州市凤阳县第二中学2019-2020学年高二上学期期中数学(文)试题(已下线)专题13 抛物线-2020-2021学年高中数学新教材人教A版选择性必修配套提升训练陕西省西安中学2021-2022学年高二上学期期中文科数学试题(已下线)第05练 抛物线-2022年【寒假分层作业】高二数学(苏教版2019选择性必修第一册)