1 . 已知空间三点
,
,
,设
.
(1)求
与
的夹角大小;
(2)若
与
互相垂直,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ed6fdedba6350d595d1b122afd1f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e430e69626475710155d0c5976acd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4221c79dad4f2ea4140f61d13ee2d553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2173339d9da757315616da1b03f468.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40436543cc51f42b5b5d93e55a407ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4e49d17d4ad440d37c6f4bc8daba25.png)
您最近一年使用:0次
2 . 已知平行六面体
中,
,
,
,
,则
的长度为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623dd89d77a1c1d60915808fe08f2a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,在平行六面体
中,M为AC与BD的交点,若
,
,
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2021/10/18/2832078255874048/2834117571321856/STEM/ac2895a4-0648-42b6-ba47-64850708d7b4.png?resizew=268)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a4caffc1e78b7dffa2d8a9bdf5fbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65679483646398be2221c443ac814a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63242d8edab5d6840d306a0a32e7af96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e9f40b2d096ab9372780fa90687d6b.png)
![](https://img.xkw.com/dksih/QBM/2021/10/18/2832078255874048/2834117571321856/STEM/ac2895a4-0648-42b6-ba47-64850708d7b4.png?resizew=268)
A.1 | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
2021-10-21更新
|
1086次组卷
|
11卷引用:四川省资阳中学校2021-2022学年高二上学期期中考试数学(理)试题
四川省资阳中学校2021-2022学年高二上学期期中考试数学(理)试题安徽省安庆市第一中学2021-2022学年高二上学期期中数学试题重庆市第七中学校2021-2022学年高二上学期期中数学试题海南省海口市灵山中学2021-2022学年高二上学期期中考试数学试题安徽省六安市新安中学2021-2022学年高二上学期期中数学试题江苏省无锡市江阴高级中学2021-2022学年高二上学期期中数学试题重庆市铁路中学校2022-2023学年高二上学期期中数学试题重庆市第十八中学2021-2022学年高二上学期10月考试数学试题福建省南安市侨光中学2022-2023学年高二上学期第二次阶段考试(12月)数学试题安徽省滁州市定远县民族中学2022-2023学年高二上学期期末数学试题海南省海口市第四中学2023-2024学年高二上学期第一次月考数学试题