1 . 数学与建筑的结合造就建筑艺术品,如吉首大学的校门是一抛物线形水泥建筑物,如图,若将该大学的校门轮廓(忽略水泥建筑的厚度)近似看成抛物线
(
)的一部分,且点
在该抛物线上,则该抛物线的焦点坐标是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/cca35b4d-ce7d-4125-a9d5-adefbe444453.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790c9e6d71a7d5000dad55a995e30352.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/cca35b4d-ce7d-4125-a9d5-adefbe444453.png?resizew=199)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知数列
的前n项和
,数列
中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71dadecfaa30597a252f0c783962a881.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e3c2a7165780cddbb9afc6010a2f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71dadecfaa30597a252f0c783962a881.png)
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3 . 下列说法正确的是___________ .
①直线
(
)必过定点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
②直线
在y轴上的截距为4
③直线
的倾斜角为120°
④过点
且垂直于直线
的直线方程为
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a6f708e6d6f7b39979f4fe485029a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88608790d85e880a6a84a5e4f926b82e.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22a292c25bf81dff2bb6d211b492aa4.png)
④过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c7b74fd862d7e3f35e40ae1f626c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bf4c5441af2933c5bd4422b3dfad28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f281814a940820e52ec332185871e22f.png)
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4 . 圆
上的点到直线
的最大距离是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15407eb47a746a18c27ed9c52e01509a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6fa0d5a70443ed49c3a9ceb0935a755.png)
A.36 | B.![]() | C.![]() | D.18 |
您最近一年使用:0次
名校
5 . 如图,空间四边形OABC中,
,
,
,点M在OA上,
,点N为BC中点,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/21ff7172-848f-4a13-b27d-3a3cc2d83aa8.png?resizew=175)
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/ebe72d1b634f1e89d8699e605e7d46af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014dff8997c661055229de29c61cfc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/21ff7172-848f-4a13-b27d-3a3cc2d83aa8.png?resizew=175)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-01-09更新
|
292次组卷
|
2卷引用:天津市武清区河西务中学2023-2024学年高二上学期第三次统练数学试卷
6 . 若等差数列
的首项
,
,记
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681967bfbdcdae96320e06da896b4da4.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17f3bfd1e8c6d6284efdb69bcbada97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d774634e468a66a09297481b477cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3c2263e48afd4f7b961a1ed4539222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681967bfbdcdae96320e06da896b4da4.png)
您最近一年使用:0次
2024-01-09更新
|
702次组卷
|
3卷引用:天津市武清区河西务中学2023-2024学年高二上学期第三次统练数学试卷
天津市武清区河西务中学2023-2024学年高二上学期第三次统练数学试卷广东省惠州市第一中学2024届高三上学期第四次阶段测试数学试题(已下线)1.2.2等差数列的前n项和公式(分层练习)-2023-2024学年高二数学同步精品课堂(北师大版2019选择性必修第二册)
名校
解题方法
7 . 如图,在四棱锥
中,底面
为直角梯形,
,
平面
,
,点
分别在线段
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/5c17bde0-fa82-4bb8-8437-1017c48a654e.png?resizew=164)
(1)求证:
平面
;
(2)求平面
与平面
夹角的正弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405effb49ef901476701e72cc47918da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8412dfb48302532531d77e589fb5ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/5c17bde0-fa82-4bb8-8437-1017c48a654e.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7c261740ac2ae26715e1298ca278a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5f236e0c248607721ff77b6ea8b6ee.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5f236e0c248607721ff77b6ea8b6ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b81fb655624ff75a5eab94de9b8c8e9.png)
您最近一年使用:0次
2024-01-09更新
|
684次组卷
|
2卷引用:天津市武清区河西务中学2023-2024学年高二上学期第三次统练数学试卷
解题方法
8 . 已知等差数列
的前
项和为
,若
与
是方程
的两个实根,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414e7c8cc753dc989a8a5e74c18240bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb42578f654fb61e826026d2199751.png)
A.46 | B.44 | C.66 | D.40 |
您最近一年使用:0次
名校
9 . 设
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86a819dab0df5557d507518c2278316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a366e2168c7a521f062cfafe81ba76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebc0cc988dccd7f91306fbfc0a79501.png)
A.![]() | B.![]() | C.27 | D.26 |
您最近一年使用:0次
名校
10 . 已知函数
,则下列结论中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf1096f56d3609e9d332cd8d6e37e6e.png)
A.函数![]() ![]() |
B.函数![]() ![]() |
C.函数![]() ![]() |
D.函数![]() ![]() ![]() |
您最近一年使用:0次