2014高三·全国·专题练习
1 . 如图,在四面体ABCD中作截面PQR,若PQ,CB的延长线交于M,RQ,DB的延长线交于N,RP,DC的延长线交于K,
![](https://img.xkw.com/dksih/QBM/2014/4/14/1571618008072192/1571618013528064/STEM/9c3f1752-78fe-4c52-bf86-c1a03275c83c.png?resizew=186)
求证:M,N,K三点共线.
![](https://img.xkw.com/dksih/QBM/2014/4/14/1571618008072192/1571618013528064/STEM/9c3f1752-78fe-4c52-bf86-c1a03275c83c.png?resizew=186)
求证:M,N,K三点共线.
您最近一年使用:0次
2016-12-02更新
|
1353次组卷
|
7卷引用:人教A版2017-2018学年必修二 2.1.1平面数学试题1
人教A版2017-2018学年必修二 2.1.1平面数学试题1(已下线)2014届高考数学总复习考点引领+技巧点拨第八章第1课时练习卷(已下线)8.4.1 平面同步(课时作业)-2021-2022学年高一数学同步精品课件+课时作业(人教A版2019必修第二册)(已下线)8.4.1 平面 (精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)考点5 共线与共面问题 2024届高考数学考点总动员【练】(已下线)第一章 点线面位置关系 专题四 共线问题 微点2 立体几何共线问题的解法综合训练【基础版】(已下线)FHsx1225yl192
2 . 过点
,
的直线的斜率为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50723cfe72c92ca76ffd13af62d4a363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dc5c14f112c2b97f4804aad23e0f3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 如图(1)五边形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c77711d4ca67104df5e95ad4ff276d8.png)
,将
沿
折到
的位置,得到四棱锥
,如图(2),点
为线段
的中点,且
平面
.
(1)求证:平面
平面
;
(2)若直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
与所成角的正切值为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c77711d4ca67104df5e95ad4ff276d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c932648dbd3edcc2b507861c6e9539ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef6a83b5aaabf70cc39c92d7575ff65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7767d492158189b23af332a8016ed37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
您最近一年使用:0次
2017-05-21更新
|
764次组卷
|
6卷引用:山西省孝义市2017届高三下学期高考考前质量检测三(5月模拟)数学(理)试题
4 . 如图,在四棱锥
中,底面是边长为
的菱形,且
,
,
分别为
的中点.
(1)证明:
;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4e5548755c90782e8e8c2f7194220f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930e85bc9f73e86cfb6ce9b076433f1b.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2b73b8c063c120986eee308070dcb4.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2017/10/26/1803690576961536/1804519103963136/STEM/8b528eb3855044abaa4c411db5fde2d2.png?resizew=208)
您最近一年使用:0次
名校
5 . 如图,
为信号源点,
、
、
是三个居民区,已知
、
都在
的正东方向上,
,
,
在
的北偏西45°方向上,
,现要经过点
铺设一条总光缆直线
(
在直线
的上方),并从
、
、
分别铺设三条最短分支光缆连接到总光缆
,假设铺设每条分支光缆的费用与其长度的平方成正比,比例系数为1元/
,设
,(
),铺设三条分支光缆的总费用为
(元).
![](https://img.xkw.com/dksih/QBM/2020/1/23/2383312111058944/2383460073586688/STEM/15c501b46443476ba5020de2b195e9de.png?resizew=257)
(1)求
关于
的函数表达式;
(2)求
的最小值及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/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/3472adabce64966ea42ded8f208fc3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793a6371b465e381452fe02e0de856ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca65ed2cd1ebc1588af38cd51409cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01486eeae6fb8e1f12103690ecfc87ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f5a953038f38cce86187f1619f6876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61eb9f3440fffdfd69a476e2cde76ce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://img.xkw.com/dksih/QBM/2020/1/23/2383312111058944/2383460073586688/STEM/15c501b46443476ba5020de2b195e9de.png?resizew=257)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
您最近一年使用:0次
2020-01-23更新
|
203次组卷
|
5卷引用:2017届上海市复旦大学附属中学高三毕业考试数学试题
2017届上海市复旦大学附属中学高三毕业考试数学试题(已下线)第1章 直线与方程 单元综合检测(附加篇:向量法)(单元培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)(已下线)课时33 点到直线的距离-2022年高考数学一轮复习小题多维练(上海专用)(已下线)模块11 坐标平面上的直线-2022年高考数学一轮复习小题多维练(上海专用)江苏省盐城市伍佑中学2022-2023学年高二上学期学情调研(一)数学试题
名校
6 . 已知圆
的圆心在直线
上,且与直线
相切,被直线
截得的弦长为
.
(Ⅰ)求圆
的方程;
(Ⅱ)若
,
满足圆
的方程,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baabfd32465e9e50409413d9c1358279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b577bfa750a02485971f2147ce4daac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a6b676fc870f63c2431b66de9762af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(Ⅰ)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64255814aa2dd177e3209e92c0d30b4.png)
您最近一年使用:0次
解题方法
7 . 如图,P是△ABC所在平面外一点,D、E分别是△PAB和△PBC的重心.求证:DE//AC,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07a5609808a69f9f3cd9d84dd3f1fc5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/8b6ae6c5-cfb3-46d6-8b03-ffe23ae43a75.png?resizew=175)
您最近一年使用:0次
8 . 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)
您最近一年使用:0次
2018-01-28更新
|
507次组卷
|
7卷引用:2017届河南南阳一中高三文上学期月考四数学试卷
名校
解题方法
9 . 如图,平行四边形
中,
,
,
平面
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/c28094d0-c233-4774-a908-1c57c3aab2b9.png?resizew=276)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1391573c30964b87ca3429bf67ae22aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/c28094d0-c233-4774-a908-1c57c3aab2b9.png?resizew=276)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425bb0d1c21eb4448dbbe9a41efa7538.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425bb0d1c21eb4448dbbe9a41efa7538.png)
您最近一年使用:0次
2017-05-18更新
|
872次组卷
|
3卷引用:河北省唐山市2016-2017学年度高三年级第三次模拟考试文科数学试题
名校
解题方法
10 . 如图,在四棱锥
中,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
平面
,BC//平面PAD,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404fc19da3e4da41e9147e9f0ca64957.png)
,
.
![](https://img.xkw.com/dksih/QBM/2018/12/5/2090404214185984/2094345209585664/STEM/6c177e387a3e4574aace4c3b4ae715ec.png?resizew=209)
求证:(1)
平面
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.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/404fc19da3e4da41e9147e9f0ca64957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c73f29a8f7f886cd1c277ba469869d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42061a2cdc0652dbc39d72ef1bc0f58b.png)
![](https://img.xkw.com/dksih/QBM/2018/12/5/2090404214185984/2094345209585664/STEM/6c177e387a3e4574aace4c3b4ae715ec.png?resizew=209)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810ee7bc82b6f452afb3fc18691abc3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2017-11-15更新
|
833次组卷
|
3卷引用:江苏省清江中学2017-2018学年高二上学期期中考试数学试题