1 . 如图,PA⊥平面ABC,AB⊥BC,
为PB的中点.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676961976320/1572676967497728/STEM/fd2310c445874b0aa1bbad4da012af0a.png)
(Ⅰ)求证:AM⊥平面PBC;
(Ⅱ)求二面角
的余弦值;
(Ⅲ)证明:在线段PC上存在点D,使得BD⊥AC,并求
的值
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676961976320/1572676967497728/STEM/685f0d042e6a4089afc9caa265302a54.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676961976320/1572676967497728/STEM/fd2310c445874b0aa1bbad4da012af0a.png)
(Ⅰ)求证:AM⊥平面PBC;
(Ⅱ)求二面角
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676961976320/1572676967497728/STEM/b60beb148897463394cca74b6dac9235.png)
(Ⅲ)证明:在线段PC上存在点D,使得BD⊥AC,并求
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676961976320/1572676967497728/STEM/6496e5100b8041b1a7f162f127feffbb.png)
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解题方法
2 . 如图,四棱锥P﹣ABCD的底面为正方形,且PA⊥底面ABCD中,AB=1,PA=2.
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592397033472/1572592402825216/STEM/1ae63a1c54fe465dab46b3499c96d2bb.png?resizew=235)
(1)求证:BD⊥平面PAC;
(2)求三棱锥B﹣PAC的体积;
(3)在线段PC上是否存在一点M,使PC⊥平面MBD,若存在,请证明;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592397033472/1572592402825216/STEM/1ae63a1c54fe465dab46b3499c96d2bb.png?resizew=235)
(1)求证:BD⊥平面PAC;
(2)求三棱锥B﹣PAC的体积;
(3)在线段PC上是否存在一点M,使PC⊥平面MBD,若存在,请证明;若不存在,说明理由.
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2卷引用:2015-2016学年北京市大兴区高二上学期期末文科数学试卷
3 . 若数列
满足
,则称
具有性质
.
(I)若数列
具有性质
,
为给定的整数,
为给定的实数.以下四个数列中哪些具有性质
?请直接写出结论.
①
;②
;③
;④
.
(II)若数列
具有性质
,且满足
.
(i)直接写出
的值;
(ii)判断
的单调性,并证明你的结论.
(III)若数列
具有性质
,且满足
.求证:存在无穷多个整数对
,满足
.
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/941fd1c83323404b82eb59b1cc2651da.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/e590c1854a9d47cd8bbf4678e4e14d76.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/2187f03a0102440ebcdac59a477bf4e1.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/3b33744b061e482e847e66dc5fc308b6.png)
(I)若数列
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/8d18db55142f4cde8b214fd5f28dbd4a.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/3b33744b061e482e847e66dc5fc308b6.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/95d176f42c9442b1ac7bf294f7c01d53.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/f152c0f8ebd8459ab099c48882687d59.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/3b33744b061e482e847e66dc5fc308b6.png)
①
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/5555aa09211945b7a5ad446b43e83640.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/c4ee57cf0a784391a5d6af699b797e62.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/e9e298641fb74e01abaae3a75028e533.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/02988b11186a4a87b3d2a4d07da63ba5.png)
(II)若数列
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/2187f03a0102440ebcdac59a477bf4e1.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/3b33744b061e482e847e66dc5fc308b6.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/d3016e8ee4b5403bad530101fd542747.png)
(i)直接写出
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/11a96fa224614e728de2e7346160a87d.png)
(ii)判断
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/2187f03a0102440ebcdac59a477bf4e1.png)
(III)若数列
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/2187f03a0102440ebcdac59a477bf4e1.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/3b33744b061e482e847e66dc5fc308b6.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/0bca47afa88f40f9aceea23aa2b7def1.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/f238f2efd41a4555bcfeb3f881e7b036.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572568586182656/1572568592187392/STEM/ab043b1caf084aaa8972fcf9739306e6.png)
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解题方法
4 . 如图,在四棱锥
中,底面
是正方形.点
是棱
的中点,平面
与棱
交于点
.
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572517709578240/1572517715451904/STEM/1e90fcac06ab48bd8042e6a79549940c.png)
(1)求证:
;
(2)若
,且平面
平面
,试证明
平面
;
(3)在(2)的条件下,线段
上是否存在点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
平面
?(直接给出结论,不需要说明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572517709578240/1572517715451904/STEM/1e90fcac06ab48bd8042e6a79549940c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c91baecb97fadd4f8ab49e6effcbc04.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3321ddb3483d7576d719d5b929f9bd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cac0572ffc70fbe6676edea45559904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(3)在(2)的条件下,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
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3卷引用:2016届北京市朝阳区高三上学期期末联考文科数学试卷
名校
解题方法
5 . 如图,在三棱锥
中,
、
、
、
分别是
、
、
、
的中点,且
,
.
;
(2)证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67aca4db7d67c75ce68fe6912d17053d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
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12卷引用:2015-2016学年北京市怀柔区高二上学期期末文科数学试卷
2015-2016学年北京市怀柔区高二上学期期末文科数学试卷2015-2016学年北京市怀柔区高二上学期期末考试文科数学试卷2016-2017学年山西大学附中高二10月月考数学试卷(已下线)北京市大兴区北京亦庄实验中学2022-2023学年高一下学期第4学段教与学质量诊断(期末)数学试题山西大学附属中学2017-2018学年高二上学期10月模块诊断数学(理)试卷江西省九江第一中学2017-2018学年高一上学期第二次月考数学试题重庆市万州三中2018-2019学年高二上学期第一次月考数学(文)试题2024年广东省普通高中学业水平合格性考试数学模拟卷(四)8.6.2直线与平面垂直练习(已下线)13.2.4 平面与平面的位置关系(1)-【帮课堂】(苏教版2019必修第二册)(已下线)第八章 立体几何初步(二)(知识归纳+题型突破)(1)-单元速记·巧练(人教A版2019必修第二册)广东省茂名市信宜市第二中学2023-2024学年高一下学期5月月考数学试题
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6 . 如图,在四棱锥P﹣ABCD中,底面ABCD是菱形,且∠DAB=60°.点E是棱PC的中点,平面ABE与棱PD交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dd44ddce-66c7-49ad-a5f0-03a9bccbc7f5.png?resizew=199)
(1)求证:AB∥EF;
(2)若PA=PD=AD,且平面PAD⊥平面ABCD,求平面PAF与平面AFE所成的锐二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dd44ddce-66c7-49ad-a5f0-03a9bccbc7f5.png?resizew=199)
(1)求证:AB∥EF;
(2)若PA=PD=AD,且平面PAD⊥平面ABCD,求平面PAF与平面AFE所成的锐二面角的余弦值.
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2020-01-11更新
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13卷引用:2016届北京市朝阳区高三上学期期末联考理科数学试卷
2016届北京市朝阳区高三上学期期末联考理科数学试卷2016届江西师大附中、鹰潭一中高三下第一次联考理科数学试卷2017届江西玉山县一中高三上月考二数学(理)试卷2017届吉林省吉林市普通中学高三毕业班第二次调研测试数学(理)试卷湖南省双峰一中2017-2018学年高三上期第一次月考理科数学试题广东省中山市2018届高三上学期期末考试数学(理)试题重庆綦江区2017—2018学年度第一学期期末高中联考高二理科数学试题【全国百强校】宁夏吴忠中学2017-2018学年高二下学期期中考试数学(理)试题重庆市綦江区2017-2018学年高二上学期期末联考数学(理)试卷湖北省黄石市2018-2019学年高二上学期期末质量监测考试数学(理)试题湖北省黄石市2018-2019学年高二上学期期末数学(理)试题重庆市江津中学2020-2021学年高二上学期第二次阶段性考试数学试题云南省陆良县2019届高三第二次模拟数学(理)试题
7 . 课本上的探索与研究中有这样一个问题:
已知△ABC的面积为S,外接圆的半径为R,∠A,∠B,∠C的对边分别为a,b,c,用解析几何的方法证明:
.
小东根据学习解析几何的经验,按以下步骤进行了探究:
(1)在△ABC所在的平面内,建立直角坐标系,使得△ABC三个顶点的坐标的表示形式较为简单,并设出表示它们坐标的字母;
(2)用表示△ABC三个顶点坐标的字母来表示△ABC的外接圆半径、△ABC的三边和面积;
(3)根据上面得到的表达式,消去表示△ABC的三个顶点的坐标的字母,得出关系式.
在探究过程中,小东遇到了以下问题,请你帮助完成:
(Ⅰ)为了△ABC的三边和面积表达式及外接圆方程尽量简单,小东考虑了如下两种建系方式;你选择第_____ 种建系方式.
(Ⅱ)根据你选择的建系方式,完成以下部分探究过程:
(1)设△ABC的外接圆的一般式方程为x2+y2+Dx+_____ =0;
(2)在求解圆的方程的系数时,小东观察图形发现,由圆的几何性质,可以求出圆心的横坐标为____ ,进而可以求出D=_____ ;
(3)外接圆的方程为_____________________________ .
已知△ABC的面积为S,外接圆的半径为R,∠A,∠B,∠C的对边分别为a,b,c,用解析几何的方法证明:
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526091812864/1572526097825792/STEM/743d8356986a4e49ab0cb0535cccb03d.png?resizew=44)
小东根据学习解析几何的经验,按以下步骤进行了探究:
(1)在△ABC所在的平面内,建立直角坐标系,使得△ABC三个顶点的坐标的表示形式较为简单,并设出表示它们坐标的字母;
(2)用表示△ABC三个顶点坐标的字母来表示△ABC的外接圆半径、△ABC的三边和面积;
(3)根据上面得到的表达式,消去表示△ABC的三个顶点的坐标的字母,得出关系式.
在探究过程中,小东遇到了以下问题,请你帮助完成:
(Ⅰ)为了△ABC的三边和面积表达式及外接圆方程尽量简单,小东考虑了如下两种建系方式;你选择第
(Ⅱ)根据你选择的建系方式,完成以下部分探究过程:
(1)设△ABC的外接圆的一般式方程为x2+y2+Dx+
(2)在求解圆的方程的系数时,小东观察图形发现,由圆的几何性质,可以求出圆心的横坐标为
(3)外接圆的方程为
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526091812864/1572526097825792/STEM/5e4f40107e5f4288a2f605407f558f0b.png?resizew=499)
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解题方法
8 . 如图,已知三棱柱ABC﹣A1B1C1中,AA1⊥底面ABC,AC=BC=2,AA1=4,
,M,N分别是棱CC1,AB中点.
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572519727022080/1572519733190656/STEM/9cf3f759-1b59-48fb-9774-d0e051fb12a2.png?resizew=160)
(Ⅰ)求证:CN⊥平面ABB1A1;
(Ⅱ)求证:CN∥平面AMB1;
(Ⅲ)求三棱锥B1﹣AMN的体积.
![](https://img.xkw.com/dksih/QBM/2016/4/18/1572595750387712/1572595756064768/STEM/e2bd4d3e7bcc4f789898599444da59fd.png)
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572519727022080/1572519733190656/STEM/9cf3f759-1b59-48fb-9774-d0e051fb12a2.png?resizew=160)
(Ⅰ)求证:CN⊥平面ABB1A1;
(Ⅱ)求证:CN∥平面AMB1;
(Ⅲ)求三棱锥B1﹣AMN的体积.
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2019-01-30更新
|
412次组卷
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4卷引用:2016届北京市石景山区高三上学期期末考试文科数学试卷
9 . 已知:四棱锥P﹣ABCD,PA⊥平面ABCD,底面ABCD是直角梯形,∠A=90°,且AB∥CD,
CD,点F在线段PC上运动.
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544606724096/1572544612851712/STEM/cee75a374c7e4a2bacdc39a9175c6afc.png)
(1)当F为PC的中点时,求证:BF∥平面PAD;
(2)设
,求当λ为何值时有BF⊥CD.
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544606724096/1572544612851712/STEM/3590a4fc9a224c678409fc9e2252ee95.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544606724096/1572544612851712/STEM/cee75a374c7e4a2bacdc39a9175c6afc.png)
(1)当F为PC的中点时,求证:BF∥平面PAD;
(2)设
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544606724096/1572544612851712/STEM/95e411471c564363a8b12711f72c4eb0.png)
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10 . 如图,在四棱锥P-ABCD中,PA⊥底面ABCD,AB⊥BC,BC∥AD,AB=BC=1,AD=2,M是PD的中点.
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977511555072/1572977517707264/STEM/7b29ceb9b6a9453fb3f174cbd60dab30.png)
(1)求证:CM∥平面PAB;
(2)求证:CD⊥平面PAC;
(3)线段AD上是否存在点E,使平面MCE⊥平面PBC?说明理由.
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977511555072/1572977517707264/STEM/7b29ceb9b6a9453fb3f174cbd60dab30.png)
(1)求证:CM∥平面PAB;
(2)求证:CD⊥平面PAC;
(3)线段AD上是否存在点E,使平面MCE⊥平面PBC?说明理由.
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