名校
1 . 在三棱锥
中,
,
平面
,点M是棱
上的动点,点N是棱
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2024/1/30/3422378703052800/3432026374717440/STEM/d16a09eff99f4f52b2501b3b39b7caac.png?resizew=200)
(1)当
时,求证:
;
(2)当
的长最小时,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74375e1ba9d3a5d373479874b6634e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc281ca213b922e5c4bddafd4ef08df.png)
![](https://img.xkw.com/dksih/QBM/2024/1/30/3422378703052800/3432026374717440/STEM/d16a09eff99f4f52b2501b3b39b7caac.png?resizew=200)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94188fea61c347a150744709920d96e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fae8e33cd86fa8dab72704eaafe1ba.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
2024-03-12更新
|
395次组卷
|
6卷引用:山东省安丘市青云学府2023届高三下学期一模数学试题
名校
解题方法
2 . 已知函数
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f789459f94c43cc44a99bbfb88f27b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c138ffd4709a48b8494a6e0a5c42e85.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-09-04更新
|
688次组卷
|
2卷引用:山东省潍坊市安丘市第一中学2023-2024学年高三上学期9月月考数学试题
解题方法
3 . 如图,在五面体
中,底面
为正方形,侧面
为等腰梯形,
,平面
平面
,
,
.
(1)求直线
到平面
的距离;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8a97f37156cec6592795da3941f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a68a008a22d5a8cea5fe8dcf31e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3611bbafb01e67e6b3bdf81857ac7d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518c01271fd11fa87af3e2ef4e66d169.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/ae2a6025-8e47-49fc-86df-3b3a47c85d49.png?resizew=158)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
4 . 函数
与
的图象如图所示,则函数
的图象可能是( )
![](https://img.xkw.com/dksih/QBM/2023/12/18/3392105990733824/3392702903754752/STEM/da8900382cd14351a25bc26466ffcbc2.png?resizew=236)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d532291921aa03a5fa5418fe664f9598.png)
![](https://img.xkw.com/dksih/QBM/2023/12/18/3392105990733824/3392702903754752/STEM/da8900382cd14351a25bc26466ffcbc2.png?resizew=236)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989422b5afa3350c1911593c59dfeb46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ecd9d4f98829d570a6a21764a3bb372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
6 . 已知复数
在复平面内对应的点分别为
则
的虚部为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d9cd8cb32f0f3d905194c6d4854d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0870d67d92a158ac5d23ed44a9c57829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc74e3e73712eb91672feb3bdeece6f.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 具有线性相关关系的变量
的一组数据如下:
其线性回归直线方程为
,则回归直线经过( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
x | 0 | 1 | 2 | 3 |
y | -5 | -4.5 | -4.2 | -3.5 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
A.第一、二、三象限 | B.第二、三、四象限 |
C.第一、二、四象限 | D.第一、三、四象限 |
您最近一年使用:0次
名校
解题方法
8 . 已知实数
、
、
,满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d65c007313af8c441277f95c7a578d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-02更新
|
264次组卷
|
2卷引用:山东省潍坊市2023-2024学年高一上学期普通高中学科素养能力测评数学试题
名校
解题方法
9 . 已知直线
的一个方向向量为(
,2),直线
的一个法向量为(m,6),若
,则m=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658f52e893d5bb9b20181bb8a01cf197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
A.![]() | B.3 | C.6 | D.9 |
您最近一年使用:0次
2023-12-30更新
|
226次组卷
|
2卷引用:山东省潍坊市昌乐及第中学2023-2024学年高二上学期12月月考数学试题
解题方法
10 . 写出一个同时具有下列性质①②的函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3c988d875438535244ee2b092a779b.png)
____________ .
①
对任意
都成立;②
在
上不单调.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3c988d875438535244ee2b092a779b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963b11b722d4b7e8b5f048954166673f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790daaa89fc9d093f45023becf765697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
您最近一年使用:0次