名校
解题方法
1 . 问题:已知
均为正实数,且
,求证:
.
证明:
,当且仅当
时,等号成立.学习上述解法并解决下列问题:
(1)若实数
满足
,试比较
和
的大小,并说明理由;
(2)求
的最小值,并求出使得
最小的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135125d796a469155fc4a22dc6be3d10.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1fcc8430f84c56f2dbd81e0c5bb6b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc07ff9c2cb23cfe630c7785ba7ed93b.png)
(1)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edfccf9159bb4010669e938f788149b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09ffc1644c7029219b88232145abbdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e32a3a39e310fe224a979e0cafce49.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9447fa25fa5be609b960f77971610e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2 . 已知数列
的前n项和为
,
,
,
.
(1)求证:数列
为等差数列;
(2)令
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f60a13994e218c3f513d9fdcdc80306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da27adffd039c32bb5b7a8d354dfe3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa498949b5868918fdd734b735006228.png)
您最近一年使用:0次
2023-06-16更新
|
348次组卷
|
2卷引用:江苏省扬州市2022-2023学年高二下学期开学考试数学试题
名校
解题方法
3 . 如图所示,已知四边形ABCD是正方形,四边形ACEF是矩形,M是线段EF的中点.
平面BDE;
(2)若平面
平面
,平面
平面
,试分析l与m的位置关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3e2deda1ce6ec95b5e89220e826b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48abba67b697688749cf92b8c7205161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24462999a96dfae3b4123ef4c59a48ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2685e63e66cd2c9a048590bc0f16d.png)
您最近一年使用:0次
2022-05-03更新
|
988次组卷
|
6卷引用:江苏省扬州市宝应区曹甸高级中学2022-2023学年高三上学期第一次月考数学试题
江苏省扬州市宝应区曹甸高级中学2022-2023学年高三上学期第一次月考数学试题福建省漳州第三中学2021-2022学年高一下学期期中考试数学试题(已下线)第11练 空间直线、平面的平行-2022年【暑假分层作业】高一数学(人教A版2019必修第二册)(已下线)第03讲 直线、平面平行垂直的判定与性质(讲)浙江省金华市曙光学校2023-2024学年高一下学期4月月考数学试题(已下线)必考考点5 立体几何中的位置关系 专题讲解 (期末考试必考的10大核心考点)
4 .
已知正数
,
,
成等差数列,且公差
,求证:
,
,
不可能是等差数列.
设实数
,整数
,
.证明:当
且
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](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/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c70fcaa661df4fbcad820b439accda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9237dbe3a4f28962ef2870b4e7dab599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26302e47e2926b0e807952b0efe7463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dab9e79198239cda875305fd6809b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01710dd52c8fcfd6253697797b330453.png)
您最近一年使用:0次
名校
5 . 已知常数
满足
,数列
满足
,
.
Ⅰ 求
,
,
;
Ⅱ 猜想
的通项公式,并给出证明;
Ⅲ 求证:
对
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b77c5a598898e503e928a686d86791d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a39fe0a3527ae1cf0a394c0086805c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a220e7c3069eacf5718b5d816b16559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64c5f4e00eb5e6d08b4441628f28c20.png)
Ⅰ 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa33c2bd791339d32821077846605d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea68e3e47a094d30bcda211741da5d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248347083c0b7c315dba8b27259af05d.png)
Ⅱ 猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a39fe0a3527ae1cf0a394c0086805c.png)
Ⅲ 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d001dcaa1ea0fcfa7649d20efb3f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6600e42d47309d55877a0c23add5dfbf.png)
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6 . 对于定义域为D的函数
,如果存在区间
,同时满足:①
在
内是单调函数;②当定义域是
时,
的值域也是
.则称
是该函数的“和谐区间”.
(1)证明:
是函数
=
的一个“和谐区间”.
(2)求证:函数
不存在“和谐区间”.
(3)已知:函数
(
R,
)有“和谐区间”
,当
变化时,求出
的最大值.
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/85788af6b4a64af49a2488b14790cbc4.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/0c9cc65ece4c41f7932a390bb4a491c1.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/86162c78c4b144bc89a2c748a040b308.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/5bfa40ca62b848a4b0515b76807276ec.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/5bfa40ca62b848a4b0515b76807276ec.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/86162c78c4b144bc89a2c748a040b308.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/5bfa40ca62b848a4b0515b76807276ec.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/5bfa40ca62b848a4b0515b76807276ec.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/f237254e258b4ec281e12610b5d7e5ab.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/85788af6b4a64af49a2488b14790cbc4.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/63c0d3e3823644e5bbe2efe41ffe1590.png)
(2)求证:函数
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/860a31536a6b4cbba385cb94a18d53cf.png)
(3)已知:函数
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/903023ddba954478acf160b661848db1.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/80ca0bb0234f4b819f857dd8814e6fa2.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/5b6cb3b1916a44acbeee023fcd25fee7.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/5bfa40ca62b848a4b0515b76807276ec.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/931f1a47f3fd41e6bd63d40181e59177.png)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182766161920/STEM/036270e93bff4c29880b98c7701723d3.png)
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10-11高一上·江苏南通·期中
7 . 已知函数
.
(1)判断并证明
的奇偶性;
(2)求证:
;
(3)已知a,b∈(-1,1),且
,
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319537d01e112733378c7db0c9f97c07.png)
(1)判断并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db48ca9fe7c14d17493fa4a4333aa273.png)
(3)已知a,b∈(-1,1),且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c083bdb6c8f679ae479e3b0c405abff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79b135e345c4ec69529c86a7726f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3bf2007903adc64d089a054c2284a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4889b4b46d3cd6dd677d200bdf4914fe.png)
您最近一年使用:0次
2016-12-01更新
|
1255次组卷
|
5卷引用:2011-2012学年江苏省扬州中学高二下学期期中考试文科数学试卷
(已下线)2011-2012学年江苏省扬州中学高二下学期期中考试文科数学试卷(已下线)2010年江苏省南通市高一上学期期中考试数学试卷2015-2016学年广东广州执信中学高一上学期期中数学试卷人教A版(2019) 必修第一册 必杀技 第四章 专题3指数函数、对数函数吉林省洮南市第一中学2020-2021学年高一上学期第三次月考数学(文)试题
2013·江苏·一模
名校
8 . 在平面直角坐标系xOy中,如图,已知椭圆C:
+
=1的上、下顶点分别为A、B,点P在椭圆C上且异于点A、B,直线AP、PB与直线l:y=-2分别交于点M、N.
![](https://img.xkw.com/dksih/QBM/2013/4/11/1571182578401280/1571182583971840/STEM/62ce629f-5beb-44da-ae7e-70a6d6b344ed.png)
(1)设直线AP、PB的斜率分别为k1,k2,求证:k1·k2为定值;
(2)求线段MN长的最小值;
(3)当点P运动时,以MN为直径的圆是否经过某定点?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de95471bb6c16acb4fd84d8315e6a637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a476588acbf41d798cc234a52fa21a8.png)
![](https://img.xkw.com/dksih/QBM/2013/4/11/1571182578401280/1571182583971840/STEM/62ce629f-5beb-44da-ae7e-70a6d6b344ed.png)
(1)设直线AP、PB的斜率分别为k1,k2,求证:k1·k2为定值;
(2)求线段MN长的最小值;
(3)当点P运动时,以MN为直径的圆是否经过某定点?请证明你的结论.
您最近一年使用:0次
2016-12-02更新
|
1047次组卷
|
5卷引用:2014届江苏省扬州中学高三开学检测文科数学试卷
(已下线)2014届江苏省扬州中学高三开学检测文科数学试卷(已下线)2013届江苏南师附中、天一中学等五校高三下学期期初教学质量调研数学卷(已下线)2013届江苏南师附中高三下学期期初教学质量调研数学试卷上海市金山中学2016-2017学年高二下学期3月段考数学试题安徽省安庆市九一六学校2020-2021学年高二下学期开学考试数学(理)试题
名校
9 . 如图,在四棱锥
中,底面
是菱形,平面
平面
,
是边长为2的正三角形,
,
是
中点,过点
,
,
的平面与
交于点
.
;
(2)求证:
;
(3)求二面角
的正切值.
![](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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1720da6d65e7fa854d98322d3864240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad6f8846d4294ae3789a6ddd17af5b6.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6600c93130ba16f270a449e261d15f.png)
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7日内更新
|
682次组卷
|
2卷引用:江苏省扬州市新华中学2023-2024学年高一下学期适应性练习数学试题
名校
10 . 如图,在四棱锥
中,
,
,
,E为棱
的中点,
平面
.
平面
;
(2)若二面角
的大小为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bec6242a4b3f7bfb4b7033a67328c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c20e88a33043f4279fff360c81006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
您最近一年使用:0次
2024-06-08更新
|
1308次组卷
|
2卷引用:江苏省扬州市新华中学2023-2024学年高一下学期5月月考数学试题