1 . 如图,在梯形
中,
,且
,点
为空间内任意一点,设
,
,则向量
=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/e04b235f-8959-4775-bc1f-5230efa7e2ac.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71de7c0bdb3cb6608b3a37d668bf0823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cefb3de8805e7febdf23b4e959d9711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07dcf0b16163e0e0e0c0f248466ee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f28b09c6074898b0bf992928336eb5b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/e04b235f-8959-4775-bc1f-5230efa7e2ac.png?resizew=158)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-11-04更新
|
327次组卷
|
3卷引用:河南省部分地区联考2023-2024学年高二上学期阶段性测试(一)数学试题
名校
2 . 如图,正方体
的棱长为1,设
,则下列各式的值为1的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857f8416189ae60395cbd9cbcc939fd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/8a428815-2250-4fdb-a39b-dd125fea7b29.png?resizew=161)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-10-28更新
|
207次组卷
|
4卷引用:湖南省娄底市涟源市第二中学2023-2024学年高二上学期10月月考数学试题
3 . 《九章算术》中将四个面都为直角三角形的四面体称为鳖臑.如图,在鳖臑
中,
平面
,
平面
,
为
的中点,
.
(1)设
,
,
,用
表示
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9edf677346f7ceba0e70a51395bbf98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/133f9b0b-3482-47bc-b382-1a824ab8dd1d.png?resizew=186)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d9ac737639ad7ce99887f9ef07685c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20a9410ceb649e303910f8efe5f7531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ab526047942ab1767de848538d1ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8c53645db602c72b00b599c2c0ff97.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27a1d6706cd035223361c988868dac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2372bef75fa2ba16e360b552fcf6cd.png)
您最近一年使用:0次
2023-10-27更新
|
199次组卷
|
10卷引用:贵州省遵义市2023-2024学年高二上学期10月月考数学试题
贵州省遵义市2023-2024学年高二上学期10月月考数学试题贵州省普通高中部分学校2023-2024学年高二上学期第一次联考数学试题辽宁省部分高中2023-2024学年高二上学期10月月考数学试题陕西省西安市昆仑中学2023-2024学年高二上学期10月月考数学试题山西省部分名校2023-2024学年高二上学期10月联考数学试题内蒙古部分名校2023-2024学年高二上学期10月联考数学试题广东省佛山市南海区第一中学2023-2024学年高二上学期第一次大测(10月)数学试题内蒙古自治区第二地质中学2023-2024学年高二上学期10月月考数学试题四川省眉山市仁寿第一中学校南校区2023-2024学年高二上学期12月阶段性模拟测试数学试题广东省深圳市名校2023-2024学年高二上学期期中联考数学试题
4 . 如图,在四面体OABC中,M是棱OA上靠近点A的三等分点,N,P分别是BC,MN的中点.设
,
,
,用
,
,
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420ad6159fc091d6a5ffddf0676d2662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c2e7e9fd8519fd1c293cc577408263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40f8ef7e3af00c41f85a20578afdb57.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/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/bde83123-41ec-42fe-bb5e-708c025f0f79.jpg?resizew=125)
您最近一年使用:0次
名校
5 . 在平行六面体
中,
,
,则
的长( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926720901aaadb0f4556caec51d3eeab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b735c72cfb59b24ec9c4aae288942252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
A.10 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-10-17更新
|
233次组卷
|
2卷引用:山西省晋中市博雅培文实验学校2023-2024学年高二上学期9月月考数学试题
名校
解题方法
6 . 如图,在平行六面体
中,
,
,则直线
与直线
所成角的余弦值为( )
![](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/23da2172e63c897e197b1f5bfbf5ef9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/4/53bea25e-df44-488b-a230-545d615b498e.png?resizew=183)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-10-17更新
|
534次组卷
|
2卷引用:北京市顺义牛栏山第一中学2023-2024学年高二上学期10月月考数学试题
名校
7 . 在四面体
中,下列四个结论中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2023-10-15更新
|
165次组卷
|
2卷引用:广东省广州市九十七中2023-2024学年高二上学期第一次月考数学试题
8 . 如图,二面角
等于
,
、
是棱
上两点,
、
分别在半平面
、
内,
,
,且
,
,
,则
的长等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bbd99327195520a4ca3ce3b9a0577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/c638fb895acd987140d0ca6bef097499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0a2d7d40a6c0bf1fddb802db381689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/ddd03c85-0f90-43df-af86-e2962f59b374.png?resizew=170)
您最近一年使用:0次
2023-10-14更新
|
329次组卷
|
2卷引用:安徽省涡阳县第三中学2023-2024学年高二上学期10月月考数学试题
名校
解题方法
9 . 如图,在斜四棱柱
中,底面
是边长为1的正方形,
,记
.
![](https://img.xkw.com/dksih/QBM/2023/10/10/3342973715734528/3344512309739520/STEM/07d74803f6384d7c97e7de6c3528746d.png?resizew=179)
(1)证明:
;
(2)求侧棱
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e42d2046a0e800a6bf082172027612e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfb9769a14ebf5cbc5fa0c06ce96435.png)
![](https://img.xkw.com/dksih/QBM/2023/10/10/3342973715734528/3344512309739520/STEM/07d74803f6384d7c97e7de6c3528746d.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa142bb96af98b846997e681609739f.png)
(2)求侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
您最近一年使用:0次
2023-10-12更新
|
372次组卷
|
5卷引用:湖南省部分学校(桃江县第一中学等校)2023-2024学年高二上学期10月联考数学试题
10 . 如图,在三棱柱中,
为空间一点,且满足
,
,下面选项错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/31/0f2a6365-4697-41eb-a8b4-0bb015424bc6.png?resizew=152)
A.当![]() ![]() ![]() | B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() | D.当![]() ![]() ![]() |
您最近一年使用:0次