名校
1 . 数学家欧拉于1765年在他的著作《三角形的几何学》中首次提出定理:三角形的外心(三边中垂线的交点)、重心(三边中线的交点)、垂心(三边高的交点)依次位于同一直线上,且重心到外心的距离是重心到垂心距离的一半,这条直线被后人称之为三角形的欧拉线.已知
的顶点为
,
,
,则该三角形的欧拉线方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44fbffcf19a245f3428ba0c35937993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da50ebd2656745259525c8b157e389e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a4597a7a96b0b5c8268ddbe013aea6f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-11-17更新
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3卷引用:贵州省铜仁第一中学2023-2024学年高二下学期2月开学适应性模拟检测数学试题
名校
解题方法
2 . 已知直线
:
,
:
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b2c480368b42323d6f7626bbf2bd49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17a8f5b9faae1adfcd9298a7f185928.png)
A.![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.![]() ![]() |
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2023-11-09更新
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3卷引用:贵州省晴隆县第三中学2023-2024学年高二下学期开学考试数学试题
解题方法
3 . 如图,在四棱台
中,底面为矩形,平面
平面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/efb8c393-3bf3-4f29-8029-dfd87a376fe9.png?resizew=202)
(1)证明:
平面
;
(2)若
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a45953045e613b97eeee15ac188ae2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795c38ba0cdec1de7d67c20d9e9fb338.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/efb8c393-3bf3-4f29-8029-dfd87a376fe9.png?resizew=202)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d90f7b3d321961d3c1b8e25ba56f03f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1c04946340198af69170d4ebd4b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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2023-10-19更新
|
160次组卷
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3卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
解题方法
4 . 如图1平行四边形
由一个边长为6的正方形和2个等腰直角三角形组成,沿
将2个三角形折起到与平面
垂直(如图2),连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980873ea60dbb6a7ef8b1885b849578d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/006b4ac8-cfc8-495e-8d1e-ca9573fbba00.png?resizew=353)
(1)求点E到平面
的距离;
(2)线段
上是否存在点M,使得直线
与平面
的夹角为30°.若存在,指出点M的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980873ea60dbb6a7ef8b1885b849578d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/006b4ac8-cfc8-495e-8d1e-ca9573fbba00.png?resizew=353)
(1)求点E到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
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2023-10-19更新
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2卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
5 . 如图所示,在平行六面体
中,
,
分别在
和
上,且
.
(1)证明
四点共面;
(2)若
与
相交与点
,求点
到直线
的距离.
![](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/28efb60d0c7a8642064d696624d98a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009e03ffd0b0ec7a287482683636782e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/0d6ab5c3-8c0b-454f-80cc-da3400317fd6.png?resizew=169)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c26c8c134dcd26fc0e7f39774db5f9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-10-19更新
|
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2卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
解题方法
6 . 已知直线
经过
,直线
经过点
.
(1)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
,求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bd58a6334e34b68db8e839b339df31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34104565748d3272d18a784784b63296.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2023-10-19更新
|
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3卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题贵州省“三新”改革联盟2023-2024学年高二上学期第一次联考数学试卷(已下线)2.1.2 两条直线平行和垂直的判定【第二练】
7 . 正多面体也称柏拉图立体,被誉为最有规律的立体结构,是所有面都只由一种正多边形构成的多面体(各面都是全等的正多边形),数学家已经证明世界上只存在五种柏拉图立体,即正四面体、正六面体、正八面体、正十二面体、正二十面体.已知球O是棱长为2的正八面体的内切球,MN为球O的一条直径,点
为正八面体表面上的一个动点,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8eb37a4dd75318dcbd836395e575bd.png)
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解题方法
8 . 一束光射向
轴,与
轴相交于点
,经
轴反射,与以连接
、
两点的线段总有公共点,这束光所在直线的斜率取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cc0f9aa168e43cc5759f017d69b498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a84757fa1fc2e9bf6134c12dce7fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266504a4bd910b292c74765dc9772f62.png)
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2023-10-19更新
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420次组卷
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3卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
名校
解题方法
9 . 如图三棱锥
中
,点
为边
中点,点
为线段
上的动点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/15eef04c-3e45-4326-85f4-6a2ba7506571.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b4c1ae9c57d51e27bbdb001122d3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/15eef04c-3e45-4326-85f4-6a2ba7506571.png?resizew=186)
A.存在实数![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2023-10-19更新
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4卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
解题方法
10 . 下列命题正确的是( )
A.已知![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.若直线![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.已知直线![]() ![]() ![]() ![]() ![]() ![]() |
D.已知平面![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-10-19更新
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2卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题