已知在正方体ABCD一
中,点E为底面
的中心,
,
,
,
,则
=______ ,
=_______ ,
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2f5542560c42996499c0c110529a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7894792ad339e4f8fed89bb3f0329875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca53c86f687ee688c9a312e8bb1973f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a11f704774df20a0d0aa2510249565.png)
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
21-22高二上·全国·课后作业 查看更多[3]
(已下线)1.2空间向量基本定理(同步练习)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册) 北京市对外经济贸易大学附属中学2021-2022学年高二10月质量监测数学试题湖南省长沙市中南博才高级中学等学校联考2022-2023学年高二上学期第一次月考数学试题
更新时间:2021-09-01 23:34:11
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【推荐1】如图,在四棱锥
中,底面
是边长为1的正方形,
到
,
,
,
的距离都等于2.给出以下结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/c9ad0c60-17a7-4b00-bed4-365d2044d693.png?resizew=161)
①
;②
;③
;④
;⑤
.
其中正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/c9ad0c60-17a7-4b00-bed4-365d2044d693.png?resizew=161)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe12feb54543a340f23a4109aa4440a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c91c26b86d412db6afd9745dc28e429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62774e98cb87dab5a555f38f568d778a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4367fd7fa6d0623a9e3d5bdeec29f6ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e02640f178b819e42eaf755949be26a.png)
其中正确结论的序号是
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解题方法
【推荐1】如图,在长方体ABCD-A1B1C1D1中,AA1=AD=1,E为CD的中点,点P在棱AA1上,且DP∥平面B1AE,则AP的长为_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/4c49cc22-bfc5-42ca-8214-2d09b7d05c86.png?resizew=162)
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【推荐1】已知三棱锥
,点M,N分别为线段AB,OC的中点,且
,
,
,用
,
,
表示
,则
等于_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9cb32a25c2a8bb99f75633b4cd5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eca8aa7145b2327dbccba46da05bb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd4b9ad667f6da79bc3a5737cbc1eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd4b9ad667f6da79bc3a5737cbc1eee.png)
![](https://img.xkw.com/dksih/QBM/2021/11/13/2850304005734400/2869334767181824/STEM/1c96a712-5281-47ce-9781-9129a1375539.png?resizew=243)
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【推荐2】空间中任意四个点
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3442261938ef9fb4bc23363c3e41e40a.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3442261938ef9fb4bc23363c3e41e40a.png)
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