1 . 如图,已知三棱锥
中,
,
,
为
中点,
为
中点,且
为正三角形.
(1)求证:
平面
;
(2)若
,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff29a8b0780ed051b6f8c1fd1f898ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daacf1e8f10ef1694ae0092cbd8f29d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65a7da5e349a05ef992600ac735af30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f1796428c2600bbbdff746b0311583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf6101c529b7868bc1c2fd46aca16bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909220d1db380634534190b662ee0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eedc148bbef5404a811328386e98f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabcdbce39b6e2ad08ea7dc1edeb2a78.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076fdb31d17c86dbdc53da175c6ae90b.png)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868216970715136/1870212116185088/STEM/78c2bfc08a324ae89e50fd071f9c3eb4.png?resizew=152)
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7卷引用:重庆市万州区2017-2018学年高二上学期期末考试数学文试题
名校
2 . 已知
,命题p:直线(k-1)x-ky+1=0的倾斜角为锐角,命题q:方程
表示焦点在x 轴上的椭圆.
(1)若p.q均为真命题,求k的取值范围;
(2)若
为假命题,求k 的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efe4aac81b0f87c50991998efd3878f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5983ba1f6cc1972ebc0b572ae6000edd.png)
(1)若p.q均为真命题,求k的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6777065ed14d76944be5cb45d9e2c76.png)
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3卷引用:重庆市万州区2017-2018学年高二上学期期末(理)数学试题
名校
解题方法
3 . 已知抛物线
上一点A(2,a)到其焦点的距离为3.
(1) 求抛物线C的方程;
(2) 过点(4,0)的直线与抛物线C交于P、Q两点,0为坐标原点,证明: ∠POQ=90°.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80c54f51f54a15c98fda31531cd84c7.png)
(1) 求抛物线C的方程;
(2) 过点(4,0)的直线与抛物线C交于P、Q两点,0为坐标原点,证明: ∠POQ=90°.
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5卷引用:重庆市万州区2017-2018学年高二上学期期末(理)数学试题
重庆市万州区2017-2018学年高二上学期期末(理)数学试题重庆市2017-2018学年高二上学期期末测试理科数学试题(已下线)2018年12月9日 《每日一题》文数人教选修1-1-每周一测(已下线)2018年12月9日 《每日一题》理科数学人教选修2-1-每周一测重庆市云阳江口中学校2020-2021学年高二上学期第二次月考数学试题
解题方法
4 . 已知点
在椭圆
上,直线
与x,y轴分别交于A,B两点,0为坐标原点,且△OAB 的面积的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46e420cb857c4693c962be16aa516e4.png)
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897531248017408/1903538888728576/STEM/ff01fa1d60ef413d8c885b32f77a6422.png?resizew=272)
(1)求椭圆
的离心率;
(2) 设点C、D、F2分别为椭圆
的上、下顶点以及右焦点,E 为线段OD 的中点,直线F2E 与椭圆
相交于M、N 两点,若
,求椭圆
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18961f5ae816db054ba8a5fb9aaccf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e92c8dfcf489d62368e61548450af0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74b54fca09a55c3720426e2dc4dfa9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46e420cb857c4693c962be16aa516e4.png)
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897531248017408/1903538888728576/STEM/ff01fa1d60ef413d8c885b32f77a6422.png?resizew=272)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2) 设点C、D、F2分别为椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fefccfd867f3a9c539b306ba55d3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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5 . 已知向量
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3854a1870df3dfab871bb1b15d41cb07.png)
(1)求
的值
(2)若
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a549d6faaa8e7e6ddc1506c04e841a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3854a1870df3dfab871bb1b15d41cb07.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15112d82b0eb93b7a9394cf0425e0023.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f201f6e84279e80b85f394f4d930ed41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180afd467cd4b1271ed02b5a6dcc2db1.png)
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6 . 已知椭圆C:
上的点到左焦点的最短距离为
,长轴长为
.
(1)求椭圆
的标准方程;
(2)过椭圆
的右焦点作斜率存在且不等于零的直线与椭圆
相交于
两点,问:在
轴上是否存在定点
,使得
为定值?若存在,试求出点
的坐标和定值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0e2297e289632ffc211bd20e2e772e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e420d889001a6374c80ed50a1406b135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6bfd94f6f2f41148d785f6b8a0181d.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f015ed8e497b4394053ddd19683a98f.png)
(2)过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f015ed8e497b4394053ddd19683a98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f015ed8e497b4394053ddd19683a98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecdae00f4e7c0a32253054cba55d626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed9af8c3fbdb748fd11e2423de063616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6828cd2fa20297a05f1cd6dfe25fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c59076e80b15755ef630fd5f40d1f7.png)
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4卷引用:重庆市万州区2017-2018学年高二上学期期末考试数学文试题
解题方法
7 . 已知直线PA⊥平面ABCD,∠BAD=90°,AB//DC//PM,AB=PA=2PM=2AD=2,CD = 3.
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897531248017408/1903538888687616/STEM/a2d92f985f474f3ca5fa078bb397de46.png?resizew=217)
(1)若G为线段MD的中点,求证:MD⊥平面BGC ;
(2)求二面角B-MC-D 的正弦值.
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897531248017408/1903538888687616/STEM/a2d92f985f474f3ca5fa078bb397de46.png?resizew=217)
(1)若G为线段MD的中点,求证:MD⊥平面BGC ;
(2)求二面角B-MC-D 的正弦值.
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2卷引用:重庆市万州区2017-2018学年高二上学期期末(理)数学试题
解题方法
8 . 已知直三棱柱ABC-
中,点D、E、M、N 分别为棱
、
、BC、
的中点,点P 在线段MN上,且MN =4MP.
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897531248017408/1903538888638464/STEM/e9ef22d8d26647c584e0af2084e38b22.png?resizew=162)
(1)求证: AP//平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa279d85f7cb724fc05fe2917b3b8f8c.png)
(2) 设∠BAC=120°,AB=AC=
CC,求直线AP 与平面
所成角的大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897531248017408/1903538888638464/STEM/e9ef22d8d26647c584e0af2084e38b22.png?resizew=162)
(1)求证: AP//平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa279d85f7cb724fc05fe2917b3b8f8c.png)
(2) 设∠BAC=120°,AB=AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
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2卷引用:重庆市万州区2017-2018学年高二上学期期末(理)数学试题
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9 . 已知抛物线
的焦点
,抛物线上一点
点横坐标为2,
.
(1)求抛物线的方程;
(2)过
且倾斜角为
的直线交抛物线
与
、
两点,
为坐标原点,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a21beb3c88e85fd5891d3a98fdd9ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df752709d5b0e4d69ae1c3d65db15e64.png)
(1)求抛物线的方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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3卷引用:2016-2017学年重庆市万州第二高级中学高二上学期期末考试理数试卷
10 . 直三棱柱
中,
是的中点,
且交
于
,
.
(1)证明:
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa70aa97bfdef8d906a32e989d09afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc8f1af2bc67bb341bc64ea95a651de.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9871ef21d9f2b8594bceaf3c0d943953.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60288b256e97d1a90e47c9998b551d26.png)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868216970715136/1870212116324352/STEM/d42e77849c014b9ab863e3569f851791.png?resizew=177)
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2卷引用:重庆市万州区2017-2018学年高二上学期期末考试数学文试题