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1 . 盒中有
个红球,
个黑球,
个白球,今随机地从中取出一个,观察其颜色后放回,并加上同色球
个,再从盒中取出一球,则第二次取出的是黑球的概率是__________ .
![](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/5c02bc0c74292b1e8f395f90935d3174.png)
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2 . 如图所示,点P,Q分别位于边长为1的正方形
的边
上,
,记点
为
的外心,若
,则
的最大值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfbeb7390ee66d7b126812483a3152e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e13889db9188c455a3ac91f2f32cf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e91eeb57e4fc87e26efb7d371f6f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/3e27b6a2-e055-4518-ab68-58ca764a7e9b.png?resizew=150)
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3 . 在
中,角A,B,C的对边分别是a,b,c,已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72511f149a1b13af02d0e1421d3a63a5.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2fa98bee3bda8f0b5d89d60ff02576c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72511f149a1b13af02d0e1421d3a63a5.png)
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4 . 相看两不厌,只有敬亭山.李白曾七次登顶拜访的敬亭山位于安徽省宣城市北郊,其上有一座太白独坐楼(如图(1)),如图(2),为了测量该楼的高度AB,一研究小组选取了与该楼底部
在同一水平面内的两个测量基点
与
,现测得
,
,在
点处测得该楼顶端
的仰角为
,则该楼的高度AB为____________ m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538787b3c2c9baef8d328f7bfeb110d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278183c10de47de6e0a8e7f249d2a035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
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2024-03-29更新
|
452次组卷
|
6卷引用:安徽省定远县第三中学2023-2024学年高一下学期3月月考数学试卷
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5 . 已知正四面体
的棱长为4,空间内动点
满足
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c679f4bd0f654fb8439b3271e5ee5445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d6a7903e022d881f644be192898e35.png)
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6 . 已知双曲线
的左、右焦点分别是
、
,离心率为
,
为双曲线上一点,
(
为坐标原点),则
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b12bbca30071c42be8cad84366f2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc7d24b63271dac66f6213e734c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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7 . 在四棱柱
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3cec96c4e1314eca67595920d726e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c3d5f17df41d6abf9944b0d66552eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3cec96c4e1314eca67595920d726e.png)
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解题方法
8 . 若直线
与直线
互相垂直,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0383fb8c688b46cc78799fe6fd53ef6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548cb90cdd5bcf86f895ae70d693ca26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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9 . 已知双曲线
的左、右焦点分别为
,
,点
在
的左支上,且
,
,则
的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a238a6239b4cfca485c703523299cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956c0b3335922c0586a101dfdb8fdea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2024-02-06更新
|
131次组卷
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2卷引用:安徽省滁州市2023-2024学年高二上学期1月期末联考数学试题
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10 . 已知实数x,y满足
,则
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ab94f9f873eb1445307bc4796b2a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd45bf406b891d07ae5db468c6637b8.png)
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2024-02-06更新
|
432次组卷
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4卷引用:安徽省滁州市2023-2024学年高二上学期1月期末联考数学试题