名校
1 . 空间中,两两互相垂直且有公共原点的三条数轴构成直角坐标系,如果坐标系中有两条坐标轴不垂直,那么这样的坐标系称为“斜坐标系”.现有一种空间斜坐标系,它任意两条数轴的夹角均为60°,我们将这种坐标系称为“斜60°坐标系”.我们类比空间直角坐标系,定义“空间斜60°坐标系”下向量的斜60°坐标:
分别为“斜60°坐标系”下三条数轴(
轴、
轴、
轴)正方向的单位向量,若向量
,则
与有序实数组
相对应,称向量
的斜60°坐标为
,记作
.
(1)若
,
,求
的斜60°坐标;
(2)在平行六面体
中,
,
,N为线段D1C1的中点.如图,以
为基底建立“空间斜60°坐标系”.
①求
的斜60°坐标;
②若
,求
与
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4664eed9e1abab0ed6397c58d70e731.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138c39673b579f1346c38398811105a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b525d8c768efd801ab58bc4c0da9221e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60fd9ea272088c32da829aea1de070b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad77af674bcbc49460fb989fa973372.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/529200b0-ed2f-4650-8678-cb630e8d7d0f.png?resizew=193)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ade1012bfb509cb44ee60d6111e439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1f037129b07c0be3c9be28929655bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
(2)在平行六面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a698be6c34b89c748764041281fd4da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0b24d3b14c326b2baa2d2c5e8db871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be560befd3ac8e670f8b6edd15edf31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b462f38860b00ac3b9bb1708ddd7bd.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350f162ee9aa08f4c9779481a5ef1025.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c8938a2b0b3c9971764f833bb37a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6d728b430549f00bb9c0a7bf8bf7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350f162ee9aa08f4c9779481a5ef1025.png)
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7卷引用:河南省实验中学2023-2024学年高二上学期期中考试数学试题
河南省实验中学2023-2024学年高二上学期期中考试数学试题四川省绵阳南山中学2023-2024学年高二上学期10月月考数学试题(已下线)模块一 专题1 空间向量的基本运算 B提升卷 期末终极研习室(2023-2024学年第一学期)高二人教A版安徽省卓越县中联盟2024届高三上学期第三次质量检测数学试题四川省成都市2023-2024学年高二上学期期末练习数学试题(3)(已下线)专题22 新高考新题型第19题新定义压轴解答题归纳(9大核心考点)(讲义)江苏省南京人民中学、海安实验中学与句容三中2023-2024学年高二下学期3月月考数学试题
名校
2 . 正方体
的棱长为2,点
平面
,点
是线段
的中点,若
,则当
的面积取得最小值时,三棱锥
外接球的体积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c2f227b3ec9a65debb32a0395ffd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd246f7c3c275000a94d35438570875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6818a98204f62c1b16699d26ca0c3f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed75ce5131b8067cf22ddd5e4e5e85d.png)
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3 . 已知
、
、
为空间中三个单位向量,且
、
、
与
夹角为
,点P为空间一点,满足
且
,则
最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4876efa91f38d11ce12fed2e1fbf2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d514783895850481ebcb10d8b8354884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dfcefb063de42c54340b4378dfee89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08927eb957325eead728098d7c61587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49eaf009bccbdd52b1a9817a8a3e5e23.png)
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4 . 三阶行列式是解决复杂代数运算的算法,其运算法则如下:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c971b2ecdfce17d75d0290dd194baa3b.png)
.若
,则称
为空间向量
与
的叉乘,其中
,
,
为单位正交基底.以
为坐标原点,分别以
的方向为
轴、
轴、
轴的正方向建立空间直角坐标系,已知
是空间直角坐标系中异于
的不同两点.
(1)①若
,求
;
②证明:
.
(2)记
的面积为
,证明:
;
(3)问:
的几何意义表示以
为底面、
为高的三棱锥体积的多少倍?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c971b2ecdfce17d75d0290dd194baa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b759f4d0af0d28b35bdd5648db70968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b44b6a86302386ebf96b784d02b039c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4e6bae1b67a0a1eeafdd1114a792df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f4837cd4b882c0380201dd437e7ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2772831f709c3c7c9a334b9444e0504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808173f5aafa97a38056d68247d68314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4664eed9e1abab0ed6397c58d70e731.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faea453a5148e6b281c75a0caa793452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00db2bada2cfc90c5213aca8af17df4c.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f36900d061dee46d3f76344ac576ba1.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29aa828f2bd9a5e63ee58dcaa9d0d336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd55f2f03192e5f0d76bf1cdb51872f2.png)
(3)问:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0cfd110195cf5e453947d1648ef605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4124e7ab7a93ee45858b3a4d4ab3508b.png)
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3卷引用:重庆市荣昌中学校2023-2024学年高一下学期4月期中考试数学试题
5 . 已知
为半径为
的球面上的四点,其中
间的球面距离分别为
,
,
,若
,其中
为球心,则
的最大值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f3a0f66bacf0d50bd22079147fde42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942e6dafcfcbf0682856b9f25178694d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268d034569bc3d98fef42901a335e1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6aa66831eccee8eaecd201209444de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6aa66831eccee8eaecd201209444de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e100f628a192a39081cf01af7de480e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1433c8103033c67232f2f9ae189608d.png)
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11卷引用:上海市宝山区交大附中2018-2019学年高二下学期期中数学试题
上海市宝山区交大附中2018-2019学年高二下学期期中数学试题上海市交通大学附属中学2018-2019学年高二下学期期中数学试题湖北省部分重点中学2022届高三上学期第二次联考数学试题1(已下线)专题06 空间向量与立体几何(突破训练)-备战2022年高考数学二轮复习重难考点专项突破训练(全国通用)(已下线)1.2空间向量基本定理C卷(已下线)1.2 空间向量基本定理(AB分层训练)-【冲刺满分】2023-2024学年高二数学重难点突破+分层训练同步精讲练(人教A版2019选择性必修第一册)(已下线)高二上学期第一次月考填空题压轴题50题专练-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)1.2 空间向量基本定理【第三课】(已下线)专题 1.1 空间向量基本定理及基底求最值12种题型(3)(已下线)专题 01 空间基底及综合应用(3)(已下线)专题 01 空间基底及综合应用(4)
解题方法
6 . 在平行六面体
中,
,
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/b439b998-57fe-447b-b164-35d4ccfa6068.png?resizew=202)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead0e8eadfdcefa334953e88864f424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/b439b998-57fe-447b-b164-35d4ccfa6068.png?resizew=202)
A.![]() | B.![]() |
C.![]() | D.点![]() ![]() ![]() |
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名校
7 . 如图,在棱长为2的正四面体
中,
分别为直线
上的动点,且
.若记
中点
的轨迹为
,则
等于____________ .(注:
表示
的测度,在本题,
为曲线、平面图形、空间几何体时,
分别对应长度、面积、体积.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38923a495bd92765597462dcea19c1ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe37c2a81276baca0f6987cb017e6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe37c2a81276baca0f6987cb017e6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe37c2a81276baca0f6987cb017e6a1.png)
![](https://img.xkw.com/dksih/QBM/2017/4/25/1673309765238784/1675487092047872/STEM/05fb6003267145fba0eea9b19e908734.png?resizew=179)
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|
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4卷引用:上海市实验学校2023-2024学年高二上学期期中数学试题
上海市实验学校2023-2024学年高二上学期期中数学试题2017届浙江省台州市高三4月调研(一模)数学试卷(已下线)02练-冲刺2020年高考数学小题狂刷卷(浙江专用)(已下线)痛点13 立体几何中的最值、轨迹问题-2021年新高考数学一轮复习考点扫描