1 . 如图所示,已知正方体
的棱长为1,点E,F分别是棱
的中点,点P是侧面
内一点(含边界).若
平面
,则下列说法正确的有______ .
的轨迹为一条线段
②三棱锥
的体积为定值
③
的取值范围是
④直线
与
所成角的余弦值的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4f409aa1d8abb7fe8d781c3951de02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0875cc63101ea9c8a7ad19a94bd6d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90da0522dd9378bab25de2f560aec563.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90357ba810502b61cb8b480701826f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dbb658674a3b07161de9acd1d28a77.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c798204bbe306b3efd5bc9eae594c171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
您最近一年使用:0次
解题方法
2 . 已知正四棱柱
的底边长为2,侧棱
.P为底面
上的动点,给出下列四个结论:
①若
,则满足条件的P点只有两个
②若
,则点P的轨迹是一段圆弧
③若
平面
,则DP长的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
④若
,则点P在线段
上
其中所有正确的结论序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f29c3e772e56008790298824122792.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9dc66318fd5ead9239e918dc29d83a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b69081ba8e55a60b9e673b0e1e11b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
其中所有正确的结论序号为
您最近一年使用:0次
解题方法
3 . 已知
为正方体
表面上的一个动点,
,
是棱
延长线上的一点,且
,若
,则动点
运动轨迹的长为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9c41fe1a1af563832f5374bca9b1a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4800eb70adcfd82fafd2720eddb5227f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2022-01-24更新
|
494次组卷
|
7卷引用:内蒙古通辽市2021-2022学年高三上学期期末考试数学(文)试题
名校
4 . 如图,已知正方体
的棱长为3,点
在棱
上,且
,
是侧面
内一动点,
,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/df137a57-1063-4808-b5aa-31b52e3742c5.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c2d079eac9f55a85dd4079abfe9afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f660dc35de47eaf6664b641d9d102eeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/df137a57-1063-4808-b5aa-31b52e3742c5.png?resizew=175)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-12-04更新
|
1077次组卷
|
7卷引用:内蒙古自治区2020-2021学年高三上学期12月联考数学试题
解题方法
5 . 已知定点
都在平面
内,定点
是
内异于
的动点,且
,那么动点
在平面
内的轨迹是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209cadfdeb9a62ca9c7f1d786ad8dc1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1b4b5594177f8a42d6d1ed92427a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.圆,但要去掉两个点 | B.椭圆,但要去掉两个点 |
C.双曲线,但要去掉两个点 | D.抛物线,但要去掉两个点 |
您最近一年使用:0次