名校
1 . 已知向量
,若
,
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ffce264816d856f66266611a2e00b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.1 | B.2 | C.4 | D.6 |
您最近一年使用:0次
名校
解题方法
2 . 在棱长为2的正方体
中,过点
的平面
分别与棱
,
,
交于点
,
,
,记四边形
在平面
上的正投影的面积为
,四边形
在平面
上的正投影的面积为
.给出下面有四个结论:
①四边形
是平行四边形;
②
的最大值为
;
③
的最大值为
;
④四边形
可以是菱形,且菱形面积的最大值为
.
则其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50524aaa1503092bd18419de6d851541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
④四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
则其中所有正确结论的序号是
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/35fcbf08-2588-410e-af5b-3c492fa2460d.png?resizew=178)
您最近一年使用:0次
名校
3 . 已知向量
,
,
⊥
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5b3938a90db69ac3b31ba098e8924d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3137c78aa2a6f8725bceb1269f7cce7.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/4ec0618ae3a4fde6d6220010af229b9a.png)
您最近一年使用:0次
名校
解题方法
4 . 已知空间向量
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c138ffbe396177688ca9fc2ec65e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03628acde5e55bc64fb72bf71cb86478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869ff7c699df34598280f4d5c19bddcc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 . 如图,PA⊥平面ABCD,四边形ABCD是正方形,
,M、N分别是AB、PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/dad77e59-81fe-4e4f-a50a-657a754a86bf.png?resizew=207)
(1)求证:MN⊥平面PCD;
(2)求点C到平面MND的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/dad77e59-81fe-4e4f-a50a-657a754a86bf.png?resizew=207)
(1)求证:MN⊥平面PCD;
(2)求点C到平面MND的距离.
您最近一年使用:0次
6 . 已知两个向量
,若
,则m的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2ebe06e90a0382fd1e0d6bf772044f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
您最近一年使用:0次
2023-01-09更新
|
118次组卷
|
2卷引用:山西省名校联考2022-2023学年高二上学期期末数学试题
名校
解题方法
7 . 如图,正方形
的边长为2,B,C分别为
,
的中点.在五棱锥
中,
底面
,且
,F为棱
的中点,平面
与棱
,
分别交于点G,H.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/c57ea65d-2e98-4eed-92ff-c2363d943092.png?resizew=159)
(1)求直线
与平面
所成角的大小;
(2)求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4d3d7a05e8f4f5f5a3474cbd0b1e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be89b9d1709d7974a108142c5fa2ccec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b1a3078dc4803bd5e16833ddd459e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/c57ea65d-2e98-4eed-92ff-c2363d943092.png?resizew=159)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
您最近一年使用:0次
2023-01-07更新
|
211次组卷
|
2卷引用:广东省广州市第八十九中学2022-2023学年高二上学期期末数学试题
名校
8 . 已知
,
,若
,则m的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da544743216ca217fd2a91f85c427f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44d9f6dcd2c3efe52274d034bca45fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7796cec50ed668e457ae5398295533af.png)
您最近一年使用:0次
2023-01-06更新
|
202次组卷
|
3卷引用:湖南省娄底市涟源市第二中学2021-2022学年高二上学期期末数学试题
解题方法
9 . 在长方体
中,
,
为棱
的中点,点
满足
,其中
,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e7ddfd081eddfefc60854d0af9c29d.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac6b545127bd51036a5a7b0d3cd5b320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535964b59870f898bf1907ee5a3c56f8.png)
A.当![]() ![]() ![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
名校
10 . 若
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818347e169521f77d08b3d4199234aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
您最近一年使用:0次
2023-01-05更新
|
267次组卷
|
2卷引用:湖北省荆州市八县市2022-2023学年高二上学期期末联考数学试题