1 . 如图,已知圆柱下底面圆的直径
,点
是下底面圆周上异于
的动点,圆柱的两条母线
.
平面
;
(2)求四棱锥
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16b43d600d374beb7872ca02d7bd592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
您最近一年使用:0次
解题方法
2 . 已知正整数集合
,对任意
,定义
.若存在正整数
,使得对任意
,都有
,则称集合
具有性质
.记
是集合中的
最大值.
(1)判断集合
和集合
是否具有性质
,直接写出结论;
(2)若集合
具有性质
,求证:
;
(3)若集合
具有性质
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7a9e7e09bc439aff2d7634baaa11f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c82041fe50dc35452e84b0f00abce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e630ff604dbab4752da10e6374770224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c59c02b8925749d0791cefea7b5d547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf3bb29ba0bee7c4ab257d3c28fd19f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1baf30f84a1797c8e345c624e6cab1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f84d35772b331e50e7e145957d081e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cb36dae09ce9b02ae303034637f3e7.png)
(1)判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca717c6a55e786238e64f7ebd69b9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805d4e511d914a3f9f9d0b8872932644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1282962a17a48a18edf733204054d67.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287adcb739a4890d108dd974358345fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2230aaaaa6fbb3566fed605419c4be.png)
(3)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1baf30f84a1797c8e345c624e6cab1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
名校
解题方法
3 . 在
中,角
所对的边分别为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d10b05beecfffa370d3e3a93cfc8e20.png)
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36edd882c513de863b0e961f44d9f49e.png)
(2)若
,角
的平分线交
于
.
(I)求证:
.
(II)若
,求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d10b05beecfffa370d3e3a93cfc8e20.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36edd882c513de863b0e961f44d9f49e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069390dd908ff203327958117a226593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8769f745f683ed83006cd7836c3dee.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8e04be3b1d0b66e96517a73cbcbd89.png)
您最近一年使用:0次
解题方法
4 . (1)已知
、
,求证:
,并写出等号成立的条件.
(2)若正数
、
的算术平均值是2,求
、
的几何平均值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726c078ca626f64e0d02c2666d8af105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763aedde812a5798e8dcc14dbc17b29b.png)
(2)若正数
![](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/83666674f1111c699d7c5f7b792e0285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c164ccad46c01d82312b2a6c6896a153.png)
您最近一年使用:0次
5 . 如图,在正三棱柱
中,
为
的中点,点
在
上,
,点
在直线
上,对于线段
上异于两端点的任一点
,恒有
平面
.
平面
;
(2)当
的面积取得最大值时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b9bcf4d4d165b5bfb9a272de9e34fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b5ee687274cd08dd8ac72b7e835022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f87bc10632de183256edc87c82f8382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c970a9c4f0da5435d02419d84de51d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f87bc10632de183256edc87c82f8382.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d4ceb3bf3b837d75225c04a96aa70d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e12d59170cdbf6ebfc754dd8f200bbd.png)
您最近一年使用:0次
2023-08-01更新
|
1274次组卷
|
7卷引用:宁夏吴忠市2022-2023学年高一下学期期末联合调研考试数学试题
宁夏吴忠市2022-2023学年高一下学期期末联合调研考试数学试题(已下线)【一题多解】立体几何 新旧呼应(已下线)第八章 立体几何初步(单元重点综合测试)-单元速记·巧练(人教A版2019必修第二册)(已下线)第二章 立体几何中的计算 专题一 空间角 微点10 二面角大小的计算综合训练【培优版】(已下线)13.2.4 平面与平面的位置关系(2)-【帮课堂】(苏教版2019必修第二册)(已下线)专题02 高一下期末真题精选(2)-期末考点大串讲(人教A版2019必修第二册)(已下线)专题08立体几何期末14种常考题型归类(2) -期末真题分类汇编(人教B版2019必修第四册)
解题方法
6 . 如图,在直三棱柱
中,
,
,
.
,
分别为棱
,
上的动点,
为
中点,且
.
(1)求三棱锥
体积的最大值;
(2)当三棱锥
的体积最大时,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac6f98ed81727dc5f6699ea5117fff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/67f3fa9e-6bca-41e5-a656-5fbc3b893fa2.png?resizew=173)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4f66c9a5b559123c504b59b9466738.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4f66c9a5b559123c504b59b9466738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9857316a93ee2289a32a3ef3c589e9b3.png)
您最近一年使用:0次
名校
解题方法
7 . 已知三棱锥
,点
是
的外心.
(1)若
,求证:
;
(2)求点
到平面
距离的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20916a8a46d21b2b21f2b18321934bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/ea513005-d25e-4a41-8564-3a7ad9fe5bff.png?resizew=135)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f06685685376fe7fb30bf8d7e46575e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-07-17更新
|
211次组卷
|
2卷引用:福建省莆田市2022-2023学年高一下学期期末质量监测数学试题
名校
8 . 已知正实数
,
满足
.
(1)求
的最大值;
(2)证明:
.
![](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/8e48e4c95b5d4ec4eee5057b9d77a17f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a7fcc467545e120102005b9d557462.png)
您最近一年使用:0次
2023-11-06更新
|
116次组卷
|
3卷引用:广东省顺德德胜学校2023-2024学年高一上学期11月联考数学试题
名校
解题方法
9 . 已知集合
,其中
且
,若对任意的
,都有
,则称集合
具有性质
.
(1)集合
具有性质
,求
的最小值;
(2)已知
具有性质
,求证:
;
(3)已知
具有性质
,求集合
中元素个数的最大值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd70e76e1780a839fcbff88cd71c2fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac10f1abfec87624afd60003af4eaddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5269913f25626c9615a0851c59c20d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2aa8c7598aa438022d7ff0db9a3de7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e86a882ef57f44f0ad22836079afe1.png)
(1)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f65336695f80a1fe2a7838a3ae17c51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32efe4eff75508cb93e828c735dcb695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353433462b58fe2eba495f2589b81380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2be2cef8c6e56b2381acca7f3c0cf4.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353433462b58fe2eba495f2589b81380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
2023-10-12更新
|
1777次组卷
|
5卷引用:重庆市第一中学校2023-2024学年高一上学期10月月考数学试题
解题方法
10 . 已知椭圆
的长轴长为
,过坐标原点的直线交椭圆于
两点,点
在第一象限,
轴,垂足为
,连结
并延长交椭圆于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0323cada05d84071018495e21d156ff3.png)
(1)求椭圆的标准方程;
(2)证明:
是直角三角形;
(3)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0323cada05d84071018495e21d156ff3.png)
(1)求椭圆的标准方程;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a0a6891259bf27be2280c6b6ba7430.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a0a6891259bf27be2280c6b6ba7430.png)
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