解题方法
1 . 已知椭圆
的左、右焦点分别为
、
,直线
与椭圆
交于
、
两点,
,
为椭圆
上任意一点,且
的最大值为
.
(1)求椭圆
的方程;
(2)过椭圆
的上顶点
作两条不同的直线,分别交椭圆
于另一点
和
(异于
),若直线
、
的斜率之和为
,证明直线
恒过定点,并求出定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.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/5c16eafcd77c758af3534886b1c8e365.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ea0e7989a2709fdd0e9f89f9946d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3df14e8b1b02dbda69bfbb06269cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
名校
2 . 记函数
的最小值为
.
(1)求
的值;
(2)若正数
,
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fdc01d73a9c1ea074b385be0fca073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5baee1cd96671f2b41453cd8bee3aad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708a5a3069245d1bf7732b9291d8e2fd.png)
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2020-04-19更新
|
1731次组卷
|
9卷引用:辽宁省沈阳市第二中学2020届高三下学期第五次模拟考试数学(理)试题
辽宁省沈阳市第二中学2020届高三下学期第五次模拟考试数学(理)试题辽宁省沈阳二中20219-2020学年高三高考数学(理科)五模试题2020届福建省泉州市高三一模(文科)数学试题江西省鹰潭市2021届高三(上)模拟命题大赛数学(文科)试题福建省泉州市普通高中2019-2020学年毕业班第一次质量检查(文科)数学试题福建省泉州市普通高中2019-2020学年毕业班第一次质量检查(理科)数学试题江西省宜丰中学、宜春一中、万载中学2021届高三3月联考数学(理)试题(已下线)理科数学-2022年高考押题预测卷03(全国甲卷)(已下线)文科数学-2022年高考押题预测卷03(全国甲卷)
名校
解题方法
3 . 已知函数
.
(1)求不等式
的解集;
(2)设
的最小值为
,正数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e5c7aa77883a1e716e6b31df61149c.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02bdb9352c3d83757dcf46cc84cd1d47.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/e83d6fb0116386f7aceb88947653b159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e046142ae72c832f43dce6e8103d70.png)
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2020-04-15更新
|
596次组卷
|
7卷引用:2020届辽宁省辽阳市高三一模考试数学(文)试题
名校
解题方法
4 . 已知
均为正实数,函数
的最小值为
.证明:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d761732f57039ad8eef6522438dd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fa3ce73a935d89ac023bf9bc2136d5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb218935dea452cc51bf841bd8f48c45.png)
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2020-04-18更新
|
1054次组卷
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7卷引用:辽宁省辽河油田第二高级中学2020届高三6月模拟考试数学(理)试题
解题方法
5 . 已知椭圆
:
过点
,过坐标原点
作两条互相垂直的射线与椭圆
分别交于
,
两点.
(1)证明:当
取得最小值时,椭圆
的短轴长为
.
(2)若椭圆
的焦距为2,是否存在定圆
与直线
总相切?若存在,求定圆
的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311dbbc95c35e023fb721d53c8dfc2db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68c1d20a422a363e356a160f096503c.png)
(2)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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名校
6 . 设函数
.
(1)若存在
,使得
,求实数
的取值范围;
(2)若
是(1)中的最大值,且正数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ab085ff06a309643102942fa31a637.png)
(1)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce5118394e703092a3ac1deb901eeeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deba97f507ced9a7884d4d5c855f4e3a.png)
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2019-05-19更新
|
1141次组卷
|
4卷引用:辽宁省渤大附中、育明高中2020届高三第五次模拟考试数学(理)试题
7 . 如图,四棱锥
中,底面
是边长为2的正方形,侧面
底面
,
为
上的点,且
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/6454337e-09dc-40d5-a47f-6b088887be41.png?resizew=92)
(1)求证:平面
平面
;
(2)求三棱锥
体积的最大值;
![](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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/6454337e-09dc-40d5-a47f-6b088887be41.png?resizew=92)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2019-05-22更新
|
814次组卷
|
2卷引用:【市级联考】辽宁省沈阳市2019届高三教学质量监测(三)数学(文)试题
名校
8 . 选修4-5:不等式选讲
(Ⅰ)已知
,
,且
,求证:
;
(Ⅱ)已知
,
,
,求
的最小值,并写出取最小值时
,
,
的值.
(Ⅰ)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f7be6702a18be19bf4f7f1d544c2b6.png)
(Ⅱ)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f610897f5178d16fd262c3290ade3813.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)
您最近一年使用:0次
2019-04-14更新
|
515次组卷
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3卷引用:【校级联考】东北三省三校(哈尔滨师大附中、东北师大附中、 辽宁省实验中学)2019届高三第二次模拟数学(理)试题
名校
9 . 已知函数
.
(1)求不等式
的解集;
(2)若
的最小值为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d66c6554a659186d02765c247f5e13.png)
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c546a7c7f676569ce900731005ffbbb.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11e4aebed76cbe7f4c469899b685d26.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d66c6554a659186d02765c247f5e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24489ab4d0856fbf8512622ab4b7e28e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c3ce941d36b4bfc566931858fe4566.png)
您最近一年使用:0次
2018-12-17更新
|
2491次组卷
|
18卷引用:【全国百强校】辽宁省沈阳市东北育才学校2019届高三第五次模拟数学(理)试题
【全国百强校】辽宁省沈阳市东北育才学校2019届高三第五次模拟数学(理)试题【市级联考】河南省新乡市2019届高三第一次模拟考试文科数学试题【市级联考】河南省新乡市2019届高三第一次模拟考试理科数学试题【市级联考】贵州省黔东南州2019届高三下学期第一次模拟考试数学(文)试题2019届贵州省黔东南州高三下学期第一次模拟考试(理)数学试题河南省濮阳市2022届高三下学期第一次模拟考试数学理科试题河南省濮阳市2022届高三下学期第一次模拟考试数学文科试题河南省濮阳市油田第二高级中学2022届高三下学期数学(文科)考试试题四川省盐亭中学2023届高三第三次模拟数学(文)试题宁夏六盘山高级中学2019届高三上学期期末考试数学(理)试题【市级联考】广西梧州市、桂林市、贵港市等2019届高三(上)期末数学试题(文科)【市级联考】广西梧州市、桂林市、贵港市等2019届高三上学期期末理科数学试题【市级联考】河北省邯郸市2018-2019学年高二下学期期中考试数学(理科)试题【市级联考】河北省邯郸市2018-2019学年高二下学期期中考试数学(文)试题四川省棠湖中学2019-2020学年高二下学期第二次月考数学(文)试题陕西省榆林市第十二中学2020-2021学年高三上学期12月第三次月考数学(文)试题江西省九江市第七中学2021届高三上学期期中考试数学(理)试题江西省九江市第七中学2021届高三上学期期中考试数学(文)试题
名校
10 . 已知
是正实数,且
, 证明:
(Ⅰ)
;
(Ⅱ)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b3ac1904c1a7db3ee89da6a32aac9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
(Ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212711ed49c8b9fc0ea8310f2c5b88ee.png)
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd1c0bc468399c656af5f9921f19a61.png)
您最近一年使用:0次
2019-03-11更新
|
1859次组卷
|
9卷引用:【全国百强校】辽宁省沈阳市东北育才学校2019届高三第八次模拟数学(理)试题
【全国百强校】辽宁省沈阳市东北育才学校2019届高三第八次模拟数学(理)试题【市级联考】河北省唐山市2019届高三下学期第一次模拟考试数学(理)试题【市级联考】河北省唐山市2019届高三下学期第一次模拟考试数学(文)试题河北省石家庄市第二中学2019届高三下学期第二次模拟考试数学(理)试题.黑龙江省鹤岗市第一中学2019-2020学年高三上学期12月月考数学(理)试题(已下线)2020届高三12月第02期(考点15)(理科)-《新题速递·数学》人教A版(2019) 必修第一册 逆袭之路 第二章 2.2 基本不等式人教B版(2019) 必修第一册 逆袭之路 第二章 2.2 不等式 2.2.4 均值不等式及其应用河南省南阳市唐河县文峰高级中学2021-2022学年高一10月月考数学试题