1 . 已知椭圆
:
的离心率为
,其中左焦点
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)若直线
与椭圆
交于不同的
两点,且线段
的中点
在圆
上,求
的值.
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/a5826d3371a842d5897d11dd3d446738.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/4a642c5113534c7ea256af2bf783e89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/63861191502e44afb64f86eed956d9f9.png)
(Ⅰ)求椭圆
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/a5826d3371a842d5897d11dd3d446738.png)
(Ⅱ)若直线
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/8797b5de9fcf4da3884a83020b5253df.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/a5826d3371a842d5897d11dd3d446738.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/7234428ac590404ca14823e8b6ef9123.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/93fd49921090426ab0154a48706079c9.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/ccb1a3a5bf9a419b8dcb0f61a1d4b5ac.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/11735be598c84cdda5d942036b580844.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572407156441088/1572407162454016/STEM/3e33c264861a40ecbaacfefe071f782a.png)
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2016-12-03更新
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2卷引用:2015-2016学年吉林省吉林一中高二11月月考理科数学卷
2 . 已知椭圆
的右焦点为
,点
在椭圆上.
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572355636092928/1572355641860096/STEM/77cf2d18c42e4430a86e2a5ee28062ed.png)
(Ⅰ)求椭圆的离心率;
(Ⅱ)点
在圆
上,且
在第一象限,过
作圆
的切线交椭圆于
,
两点,求证:△
的周长是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d6f746c2355072d914591bf60c3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bf2a910999a584f47222af4cbd485c.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572355636092928/1572355641860096/STEM/77cf2d18c42e4430a86e2a5ee28062ed.png)
(Ⅰ)求椭圆的离心率;
(Ⅱ)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef74c4299221a967507c6a179337581a.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/ef74c4299221a967507c6a179337581a.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/3eebde8149009f37b9f796913f596d07.png)
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3 . 设
,曲线
在点
处的切线与直线
垂直.
(1)求
的值;
(2)若
恒成立,求
的取值范围;
(3)求证:
.
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/8e28a4b0b6e342959f907f16303ea469.png)
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/aa438cfd0a2947afac6f09191793399b.png)
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/085fbd92842c476c8405b561c8e166ff.png)
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/b59edcd6b28d45c790d69bea3e123a58.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/253c902c7fde41e8bf8633f690123dac.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/0d0818d6629f4422a799d185fb81f4fa.png)
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/619bf110ab7c496faf028dccd9b4f03c.png)
(3)求证:
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572333062701056/1572333068492800/STEM/62d6201e66fd4357baa675364944c3f4.png)
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4 . 已知
,设函数
.
(Ⅰ)若
在
上无极值,求
的值;
(Ⅱ)若存在
,使得
是
在[0, 2]上的最大值,求t的取值范围;
(Ⅲ)若
(
为自然对数的底数)对任意
恒成立时m的最大值为1,求t的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181618343936/1572181624037376/STEM/33bbb06ef5d7433886248658244b515e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba98f381ca50f73059e6dffc504e4c07.png)
(Ⅰ)若
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181618343936/1572181624037376/STEM/92f10a23332e481cb3245ef4036f3b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbfd0c7caacb8f926dbc857f913a6dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(Ⅱ)若存在
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181618343936/1572181624037376/STEM/b7180da81efe4a26ba931a9361ec4102.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181618343936/1572181624037376/STEM/4f72cb76a6a542019b3eb38b68dba192.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181618343936/1572181624037376/STEM/3839af91acca4146be4b7549aba730cd.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba95c412574450cad9727cccd626227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181618343936/1572181624037376/STEM/69b12e50641445669e152eb8c3d36250.png)
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5 . 设数列
的各项均为正数,它的前
项的和为
,点
在函数
的图像上;数列
满足
.其中
.
(1)求数列
和
的通项公式;
(2)设
,求证:数列
的前
项的和
(
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c552e8d5acd7d998b050bf298aaaf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e48bf189eac63fda016886004dc419e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a9a1e683ab823e4c7e9b90a75127c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851c8763f6700bccac95949fc0d316f7.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c2a5f8ec179b72b201c3c0a670612a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f008d63a67d7fc2a475b60f788ce855a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851c8763f6700bccac95949fc0d316f7.png)
您最近一年使用:0次
2016-12-03更新
|
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4卷引用:2016届吉林省长春外国语学校高三上第二次质检文科数学试卷
6 . 已知函数
,
.
(1)当
为何值时,
轴为曲线
的切线;
(2)用
表示
中的最小值,设函数
,讨论
零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46ed609187e434e8f81b04c3df573325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67fbb13f7d4b8abb69b93a398fb66ea.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1a9b2606803172bf3f1e6667f9b980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92488620c1a10d4612501c1e5aad88af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
您最近一年使用:0次
2016-12-03更新
|
20429次组卷
|
27卷引用:2015年全国普通高等学校招生统一考试理科数学(新课标Ⅰ)
2015年全国普通高等学校招生统一考试理科数学(新课标Ⅰ)湖南省长沙市雅礼中学2017届高考模拟试卷(二)数学(文)试题湖南省长沙市雅礼中学2017届高考模拟试卷(二)文科数学试题江西省南昌市2017-2018学年高三第一轮复习训练题数学(理十七)《导数综合应用》2018届高三数学训练题(25 ):导数 (已下线)《高频考点解密》—解密05 导数及其应用【全国百强校】广西南宁市第三中学2018-2019学年高二上学期期中考试数学试题2017届河北省衡水中学高三下学期二调考试数学(文)试卷智能测评与辅导[理]-函数与方程(已下线)专题09 导数的综合应用-十年(2011-2020)高考真题数学分项湖南省邵阳市邵东县第一中学2019-2020学年高二下学期期末数学试题吉林省长春市“BEST合作体”2020-2021学年高二下学期期中数学(文) 试题2017届高河北省衡水中学三下学期二调考试数学(文)试卷北京市海淀区2021届高三年级基础练习数学试题广东省佛山市顺德区高中联盟2020-2021学年高二下学期第一次联考数学试题(已下线)专题04 函数导数及其应用-十年(2012-2021)高考数学真题分项汇编(全国通用)(已下线)专题11 导数的几何意义应用-学会解题之高三数学万能解题模板【2022版】(已下线)专题36 盘点导数与函数零点的交汇问题—备战2022年高考数学二轮复习常考点专题突破(已下线)专题04 导数解答题四川省南部中学2023届高考模拟检测(五)理科数学试题北京名校2023届高三一轮总复习 第6章 不等式 6.4 不等式的综合应用北京市人大附中2022-2023学年高二数学期末复习参考试题(1)海南省海南中学2023-2024学年高三上学期第5次月考数学试题(已下线)【一题多变】取大取小 分类讨论江苏省连云港市五校2023-2024学年高三上学期12月联考数学试题(已下线)专题22 导数解答题(理科)-2专题34导数及其应用解答题(第一部分)
7 . 已知正项数列
的首项
,前
项和
满足
.
(Ⅰ)求证:
为等差数列,并求数列
的通项公式;
(Ⅱ)记数列
的前
项和为
,若对任意的
,不等式
恒成立,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/68e7a68728494e21a277d119bdbb4d75.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/68d47144532246e080daa5a34cedf512.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/ee210b0a185f4b8eae2ab4ec19921647.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/5206cc9b414b40afaee99912e52f262e.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/df1adfeb14284cc8bb63c46d95beb890.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/37512d7dbfc744fab5e7a9f35b0afa33.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/68e7a68728494e21a277d119bdbb4d75.png)
(Ⅱ)记数列
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/fbc8236c2c4f4a3091f5f8b59fd1259b.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/ee210b0a185f4b8eae2ab4ec19921647.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/a4562a6e231e4d7a9e379e16fc796ccd.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/067b2bb95ee14b36b0007f25b1684f14.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/475eb44d2ebf4c24a6141c71205e1d87.png)
![](https://img.xkw.com/dksih/QBM/2015/7/15/1572181905178624/1572181910626304/STEM/77b584f2569c4a9089ec149633a9f5bc.png)
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2016-12-03更新
|
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2卷引用:2015届吉林省实验中学高三上学期第五次模拟考试文科数学试卷
8 . 已知函数
,
,其中
为自然对数的底数.
(1)求曲线
在点
处的切线方程;
(2)若对任意
,不等式
恒成立,求实数
的取值范围;
(3)试探究当
时,方程
的解的个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7f9b35017daa8b524c5717a355834a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a24ee6bcbc67a69f9cfba112e265591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b680f82d5ee3804b1fa103044347956c.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a34b4bf4bba566959635a7982cec6ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6aab055e34b7a027b1ce32378419b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)试探究当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30884f6bcf33868f0e4ff543f0b8c48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea114667a610f52ba215f7da367a12e0.png)
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2016-12-03更新
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1509次组卷
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3卷引用:吉林省梅河口市第五中学2018届高三4月月考数学(文)试题
2014·全国·一模
名校
9 . 某地需要修建一条大型输油管道通过240公里宽的沙漠地带,该段输油管道两端的输油站已建好,余下工程是在该段两端已建好的输油站之间铺设输油管道和等距离修建增压站(又称泵站).经预算,修建一个增压站的工程费用为400万元,铺设距离为
公里的相邻两增压站之间的输油管道费用为
万元.设余下工程的总费用为
万元.
(1)试将
表示成
的函数;
(2)需要修建多少个增压站才能使
最小,其最小值为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749d0e03dc286f2a835768d4ac5f07a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)需要修建多少个增压站才能使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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2016-12-03更新
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1282次组卷
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8卷引用:吉林省洮南市第一中学2020-2021学年第一学期高一期中考试数学(理)试题
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10 . 如图,设椭圆
的左、右焦点分别为
,点
在椭圆上,
,
,
的面积为
.
(1)求该椭圆的标准方程;
(2)是否存在圆心在
轴上的圆,使圆在
轴的上方与椭圆两个交点,且圆在这两个交点处的两条切线相互垂直并分别过不同的焦点?若存在,求圆的方程,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed073d2f87fc08320c434c7ef6025814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fca53f41a3150e8183cb7492d58ce6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e339f0933bb69a0f8108e3f9e975236f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求该椭圆的标准方程;
(2)是否存在圆心在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/12480d30-2865-459a-950b-9b316cd5c0bb.png?resizew=207)
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2016-12-03更新
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