已知正方体
的棱长为
,
,
分别为
,
的中点,点
在平面
中,
,点
在线段
上,则下列结论正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/1089a844-035e-4639-83b7-d1162f49d6c0.png?resizew=164)
①点
的轨迹长度为
;
②线段
的轨迹与平面
的交线为圆弧;
③
的最小值为
;
④过
、
、
作正方体的截面,则该截面的周长为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fec63fe626342fc41fab8b85047b53e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.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/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d42170c7d4249f6b390823606c18c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcfe69b939fd1c271747fe9d37ccdf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ddf4d708c829ece5bef03f0d9517df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/1089a844-035e-4639-83b7-d1162f49d6c0.png?resizew=164)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10dd1672822a208909bc5714e6153870.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/798762d66a342849c22d12e98a149e5c.png)
④过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/3fec63fe626342fc41fab8b85047b53e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
20-21高三上·河南郑州·阶段练习 查看更多[7]
河南省实验中学2020-2021学年高三上学期模拟试卷数学(文科)试题(已下线)理科数学-2022年高考押题预测卷03(全国甲卷)(已下线)专题23 立体几何中的压轴小题-2(已下线)江西省上饶市2023届高三第一次高考模拟考试数学(理)试题变式题6-10(已下线)专题7-1 立体几何压轴小题:截面与球(讲+练)-2(已下线)专题14 立体几何常见压轴小题全归纳(练习)(已下线)第三章 空间轨迹问题 专题六 立体几何轨迹中的范围、最值问题 微点2 立体几何轨迹中的范围、最值问题综合训练【培优版】
更新时间:2021-01-03 12:17:38
|
相似题推荐
单选题
|
困难
(0.15)
解题方法
【推荐1】如图,棱长为2的正方体
中,P为线段
上动点(包括端点).
①三棱锥
中,点P到面
的距离为定值![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa565c94154a74136b12a3811494b183.png)
②过点P且平行于面
的平面被正方体
截得的多边形的面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce9a4fe0565a6810452d3fa9c747662.png)
③ 直线
与面
所成角的正弦值的范围为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019e4600424b79fabadfc0d5c2c98c4.png)
④当点P为
中点时,三棱锥
的外接球表面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b902a374117e408be50e13caa615789.png)
以上命题为真命题的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/57e176f0-7c62-4dd4-88a8-164c60cfa053.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db26fcb4380a58ac02012e836e47d0a1.png)
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114ecab0ab272ea86979fb8cf0d1c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b36eb5bde9c25e732f560aa50e296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa565c94154a74136b12a3811494b183.png)
②过点P且平行于面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b36eb5bde9c25e732f560aa50e296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce9a4fe0565a6810452d3fa9c747662.png)
③ 直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd00f11d26db7c3a67361bb69fd5707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b36eb5bde9c25e732f560aa50e296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019e4600424b79fabadfc0d5c2c98c4.png)
④当点P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114ecab0ab272ea86979fb8cf0d1c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b902a374117e408be50e13caa615789.png)
以上命题为真命题的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/57e176f0-7c62-4dd4-88a8-164c60cfa053.png?resizew=172)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
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【推荐1】已知实数
满足
,其中
是自然对数的底数,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9015897be5dbeb1e7cbd0cd12e579a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9a62fa4bbae6bc3fa5135360e16a25.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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名校
解题方法
【推荐1】如图,已知正方体
的棱长为1,点M为棱AB的中点,点P在侧面
及其边界上运动,下列命题:①当
时,异面直线
与
所成角的正切值为2;②当点
到平面
的距离等于到直线
的距离时,点
的轨迹为拋物线的一部分;③存在点P满足
;④满足
的点P的轨迹长度为
;其中真命题的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/5756826a-6630-4dab-86e8-13c016161522.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710fb03332ec8c51992c34dd70572307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0aace589f614b7cfe067ba6f4b8aaa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c963323f3132ca62ba5b0b3aac66bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821309f088a175c00dc0f4828334503d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/5756826a-6630-4dab-86e8-13c016161522.png?resizew=170)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
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【推荐2】正方体
的棱长为3,点
在三棱锥
的表面上运动,且
,则点
轨迹的长度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8579d3c939467a9db200c15a6a6f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1899c3804cc6d11e551034a780629d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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困难
(0.15)
【推荐3】在长方体
中,
,
,点P在底面ABCD的边界及其内部运动,且满足
,则下列结论不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5441d73845911db1993bf903c4d8700f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b3cb4c667b4e6d0e14922e552ac95b.png)
A.若点M满足![]() ![]() |
B.点P到平面![]() ![]() |
C.若点M满足![]() ![]() |
D.当BP=3时,四面体![]() ![]() |
您最近一年使用:0次