1 . 如图,已知直线
平面
,相异四点
,
,
,
满足:
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647479103455232/2648192950452224/STEM/cf6c54c6-6eb3-425f-9cd9-4c60eed2c44c.png)
(1)判断空间直线
与
的位置关系,并说明理由;
(2)若
//
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a4afe69e9ee3c701f1f109c3a0a7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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://staticzujuan.xkw.com/quesimg/Upload/formula/a30262f17d1e521b48d773da22ebf452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f47a027a6886575082779772afbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2a47e92905ab5564a0c60951d332a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9c02d25d009eef7a75c9452249ae38.png)
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647479103455232/2648192950452224/STEM/cf6c54c6-6eb3-425f-9cd9-4c60eed2c44c.png)
(1)判断空间直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
您最近一年使用:0次
2021-01-31更新
|
704次组卷
|
2卷引用:第9课时 课前 空间中直线与平面的平行
2 . 如图所示,在三棱锥
中,
分别是棱
上的点,且满足
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/766565857d28617cc4c2a26ecf76ec24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b38a1c41c2a9dbb4eaa787c546c7f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da0d2e26009ddd7b1b4280a207cf243.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/e37016ed-1504-4b38-a9f2-0444bf633549.png?resizew=175)
您最近一年使用:0次
2020-02-12更新
|
681次组卷
|
5卷引用:第8课时 课前 空间中直线与直线的平行
第8课时 课前 空间中直线与直线的平行人教A版(2019) 必修第二册 过关斩将 第八章 8.5. 空间直线、平面的平行 8.5.1 直线与直线平行人教B版(2019) 必修第四册 过关斩将 第十一章 立体几何初步 11.3.1 平行直线与异面直线(已下线)【新教材精创】11.3.1平行直线与异面直线练习(1)(已下线)8.5.1直线与直线平行(分层作业)-【上好课】