已知平行六面体
,化简下列各式:
(1)
;
(2)
;
(3)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca379d60c10cbcadedf9ee8bfe38d702.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc80822a0d97609eeb1aded41b623ba0.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17808aa4b482099cfa1bfcfb3ed0039.png)
21-22高二·湖南·课后作业 查看更多[2]
更新时间:2022-03-05 20:05:37
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【知识点】 空间向量的加减运算
相似题推荐
解答题-问答题
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较易
(0.85)
名校
【推荐1】已知四面体
的所有棱长均为1.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/a4536627-9359-4fce-a549-82ac4d74691a.png?resizew=184)
(1)
;
(2)
;
(3)若点
是
的重心,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/a4536627-9359-4fce-a549-82ac4d74691a.png?resizew=184)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50f6226004632b8ab3148cf146ad42c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434c62842ad87851dcb574825d5007e8.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc3e8a1475b983d1a4295db0e16d4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad904df8b17151b166eb4c987318136d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c62e7c58606b2250c6d189d85a6ea8.png)
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较易
(0.85)
名校
【推荐2】如图,已知正方体
.点
是上底面
的中心,取
为一个基底,在下列条件下,分别求
的值.
![](https://img.xkw.com/dksih/QBM/2021/12/24/2879412410417152/2881454331420672/STEM/6589e1b2ce9547e98d20ddb868ca1b94.png?resizew=176)
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6404106e45c93fd1041654bc73498dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5cf9e5f493f8cc9bd441d928b2d25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1669773d38e8531e204debd7b58a074e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df3c9542a92b7a42e6f6bcda169357d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a14c388e1e2e5a2ff1ccf6caffbee0d.png)
![](https://img.xkw.com/dksih/QBM/2021/12/24/2879412410417152/2881454331420672/STEM/6589e1b2ce9547e98d20ddb868ca1b94.png?resizew=176)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e0af72e5757d42a1cac2376ab5f762.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea099a43004da4cf7a93471fb0f16885.png)
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