如图所示,在平行六面体
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/12/28/2882258703392768/2887905196834816/STEM/bea75d5f47ee4c718f383b127d4ebe07.png?resizew=183)
(1)求
;
(2)求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd21a4e45dc1beb069d7e78f84a51544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b735c72cfb59b24ec9c4aae288942252.png)
![](https://img.xkw.com/dksih/QBM/2021/12/28/2882258703392768/2887905196834816/STEM/bea75d5f47ee4c718f383b127d4ebe07.png?resizew=183)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafd08a9fb0f93d02352374fd96be43f.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
21-22高二上·湖北孝感·期中 查看更多[4]
湖北省孝感市2021-2022学年高二上学期期中数学试题(已下线)第06讲 空间向量及其运算-【寒假自学课】2022年高二数学寒假精品课(苏教版2019选择性必修第二册)湖北省黄冈市蕲春县英才学校2022-2023学年高二上学期期中数学试题江西省宜春实验中学2021-2022学年高二上学期期末质量检测数学试题(理)
更新时间:2022-01-05 14:01:04
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【知识点】 求空间向量的数量积
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】已知平行六面体
如图所示,其中
,
,
交于点
,点
在线段
上,且
,点
,
分别是线段
,
的中点,设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/ab507166-b99b-4ba8-a65e-3c61a07d1583.png?resizew=231)
(1)用
,
,
表示
,
;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87bf1d33358a501b214a1197698c1b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6d2a1c3145983ae5f60835040641be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703ae3e64cc6dd0dc76af04d09752ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746e93697953271f729503a31727c4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d66421989fc8910c14c7e9a9af0cf0e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/ab507166-b99b-4ba8-a65e-3c61a07d1583.png?resizew=231)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21909dd065ccc349a2cbfd4c3cf4976b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74c0f207612e015857b78b99db483e4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9cfa0686455571e9ae168077b03b46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88404a3f6f224b0674548d6d48cd515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153ae67e176038ba0978fb4f3a365bce.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知正四面体
的棱长为2,点G是
的重心,点M是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/4b6ab095-50c7-422c-ae59-4c737a6b4934.png?resizew=177)
(1)用
,
,
表示
,并求出
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/4b6ab095-50c7-422c-ae59-4c737a6b4934.png?resizew=177)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ec3efaa6b6ff5769e8999df5714a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6799b234237333b0efa331d98f0374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395590e3d649e28cd6e3b13ee58bfc64.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0c26abe42db315f0add860e760c696.png)
您最近一年使用:0次