1 . 已知四面体
中,
为
中点,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a2efd3f26a34c6f7b6277e009836ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b1fe1294cb5b9b8a8762b4a16e920d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
A.3 | B.2 | C.![]() | D.![]() |
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6卷引用:河南省焦作市博爱县第一中学2023-2024学年高二下学期4月期中考试数学试题
名校
2 . 若
构成空间的一个基底,则下列向量共面的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a953ecdb640545249adeec3343ef953.png)
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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2024-03-03更新
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4卷引用:河南省开封市五县2023-2024学年高二上学期期中联考数学试题
河南省开封市五县2023-2024学年高二上学期期中联考数学试题(已下线)模块一 专题5《 空间向量运算》 A基础卷(苏教版)河北省邢台市2023-2024学年高二上学期期末联考数学试题福建省宁德市福安市第一中学2023-2024学年高二下学期3月月考数学试题
3 . 已知点
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d85b07d22367c6c21e63aaf310edc65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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2023-12-27更新
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2卷引用:河南省焦作市2023-2024学年高二上学期11月期中考试数学试题
解题方法
4 . 在三棱锥
中,
,
,
,M,N分别为
,
的中点,设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/dd85dfa3-bfbe-417a-b671-069a573df9dc.png?resizew=156)
(1)用
,
,
表示
,并求
;
(2)求
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbab39da847da8a559994b6c6004aa60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e44a1cc4d47b13f6c3b69544c7d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14390e9b6b44472bdc7a131133ab39b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cd14dfc0024459f9d8e594c95c5106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07dcf0b16163e0e0e0c0f248466ee7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/dd85dfa3-bfbe-417a-b671-069a573df9dc.png?resizew=156)
(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/4a014dff8997c661055229de29c61cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4ea7acf140086ae816a4025d2683dc.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
您最近一年使用:0次
名校
5 . 在空间直角坐标系中,设
、
分别是异面直线
、
的两个方向向量,
、
分别是平面
、
的两个法向量,若
,
,
,
,下列说法中正确的是( )
![](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/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d71d1e5f816103a951d6ebf10af047b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b205844a4d07e7d4efc7b91bdddc2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54786f3724a740d3b99c1bb9a6c56372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bba135fa34a97f5891d2481c2fc619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85435272d58c7f9d2f9fdf52d145fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c644aea03c0ecdc3ec4a83f0e5baeaf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-12-18更新
|
160次组卷
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2卷引用:河南省安阳市第一中学2023-2024学年高二上学期第二次阶段考试数学试题
名校
解题方法
6 . 在正四棱柱
中,
,
为
的中点,
为
上的动点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/4f92601b-278a-4f52-a475-f8fdc18b4ee0.png?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c7c194c5bc2986a21fd441c81495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/4f92601b-278a-4f52-a475-f8fdc18b4ee0.png?resizew=132)
A.三棱锥![]() ![]() |
B.直线![]() ![]() ![]() |
C.![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() |
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4卷引用:河南省郑州市宇华实验学校2024届高三上学期期中数学试题
名校
解题方法
7 . 给出下列命题正确的是( )
A.直线![]() ![]() ![]() ![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.点![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
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8 . 已知空间直角坐标系
中,点
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6047cc0e579675dc82bf392e85e1e3bc.png)
A.直线![]() ![]() |
B.直线![]() ![]() ![]() |
C.点![]() ![]() ![]() |
D.![]() |
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9 . 在棱长为2的正四面体
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/5719f65b-c403-4ef6-9c11-d7aafee5d2cf.png?resizew=183)
(1)设
用
,
,
表示
;
(2)若
求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95b045bb13fe4ddb17dcd0e3f31cc39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/5719f65b-c403-4ef6-9c11-d7aafee5d2cf.png?resizew=183)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645549e504fa8e18945e64247970a552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014dff8997c661055229de29c61cfc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a487d968da4ada225cb5aab89cc7424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2023-11-29更新
|
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4卷引用:河南省洛阳市2023-2024学年高二上学期期中数学试题
河南省洛阳市2023-2024学年高二上学期期中数学试题(已下线)专题9.3 向量的数量积运算-重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)9.2 向量运算2 -【帮课堂】(苏教版2019必修第二册)河北省唐山市第五中学2023-2024学年高一下学期开学考试数学试题
名校
解题方法
10 . 如图1,已知在矩形
中,
,
,
为
的中点.将
沿
折起,使得平面
平面
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/c6be3a88-713d-455a-8e13-51538b0f8402.png?resizew=316)
(1)求证:平面
平面
;
(2)设
,
.
①是否存在
,使
?
②当
为何值时,二面角
的平面角的余弦值为
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/c6be3a88-713d-455a-8e13-51538b0f8402.png?resizew=316)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7f70c4748990ef43f780f7b9302072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79296cd4046a71e163a8f3e647a176ae.png)
①是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c4f823070b37466d31e7a6162eb44.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5266895d3c1fcb350a745bc779433b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
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2023-11-29更新
|
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2卷引用:河南省济源市济源第一中学2024届高三上学期期中数学试题