1 . 若a>0,b>0,且函数f(x)=4x3-ax2-bx+2在x=1处有极值,则ab的最大值等于
A.4 | B.8 | C.9 | D.18 |
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2 . 已知椭圆
上的点到两个焦点的距离之和为
,短轴长为
,直线
与椭圆C交于M、N两点.
(1)求椭圆C的方程;
(2)若直线
与圆
相切,证明:
为定值
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/e81ced51a3bb4a80b2eb4af5be6f2482.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/0d3f3fa4a067414caa50b07d87d3a814.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/c0b51e4052134a0ea6afde8d559e71fa.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/1df72635078645d89ea5612f95641bc1.png)
(1)求椭圆C的方程;
(2)若直线
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/1df72635078645d89ea5612f95641bc1.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/fa2ea7db011849bf863eded1b0183265.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483891224576/STEM/32a9b11f7a5d405cab4fb01f4d464c7c.png)
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3 . 已知直线
,圆
,椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0fe9059acc47d2447576e1260c4622.png)
的离心率
,直线
被圆
截得的弦长与椭圆的短轴长相等.
(
)求椭圆
的方程;
(
)已知动直线
(斜率存在)与椭圆
交于
两个不同点,且
的面积为
,若
为线段
的中点,问:在
轴上是否存在两个定点
使得直线
与
的斜率之积为定值?若存在,求出
的坐标,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834b0c299ea47b9329c9987efaaead39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0fe9059acc47d2447576e1260c4622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82eb4ba631d0f50d848aa6e576b379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
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4 . 已知命题
:函数
是
上的减函数;命题
:不等式
恒成立.若
是真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a642dc2dc6f8de26abe698c544f6f8b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572478578458624/1572478584651776/STEM/18cb7aabebd94a30ac40f7ed34495dbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0045a603e555d2d2a8ef634f9edf9951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 设函数
.
(Ⅰ)求函数
的单调区间;
(Ⅱ)设
是否存在极值,若存在,请求出极值;若不存在,请说明理由;
(Ⅲ)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ba2e75b13e9df8afe25fb470959c5.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82de6a76b05cdf8a535be84cc5993d17.png)
(Ⅲ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2945ba31a75dee30d9f2433618a1a276.png)
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6 . 设各项均为正数的等比数列
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c976b292b60b9d4fe9038de4706c136d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
(1)求数列
的通项公式;
(2)若
,求证:
;
(3)是否存在正整数
,使得
对任意正整数
均成立?若存在,求出
的最大值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c976b292b60b9d4fe9038de4706c136d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbebaac00a374da6197b76e0bc3e5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f68fd890ea6590ba9c35021df58fc3.png)
(3)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b705485fdb610af0ba19545d2dbdff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2016-12-03更新
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3卷引用:【全国百强校】黑龙江省大庆实验中学2017-2018学年高一下学期期中考试数学(文)试题
7 . 已知数列
满足
=
且
=
-
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0aafc603ba02b6702e785b00a5013.png)
).
(1)证明:1
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0aafc603ba02b6702e785b00a5013.png)
);
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5deda1cd6fa436beb194738f75ee1650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0aafc603ba02b6702e785b00a5013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52866a74e4af867ceea0efb1ad06602c.png)
(1)证明:1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e587190974891f34f5efd34fad666ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0aafc603ba02b6702e785b00a5013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52866a74e4af867ceea0efb1ad06602c.png)
(2)设数列的前
项和为
,证明
(
).
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18卷引用:【全国百强校】黑龙江省双鸭山市第一中学2018-2019学年高一下学期期中考试数学(理)试题
【全国百强校】黑龙江省双鸭山市第一中学2018-2019学年高一下学期期中考试数学(理)试题2015年全国普通高等学校招生统一考试理科数学(浙江卷)人教版高中数学 高三二轮 专题14 数列求和及综合应用 测试(已下线)2018年5月9日 证明不等式的基本方法——《每日一题》2017-2018学年高二文科数学人教选修4-5(已下线)2018年9月25日 《每日一题》人教必修5-不等关系与不等式(2)(已下线)2018年10月22日 《每日一题》人教必修5--数列与不等式的综合(上学期期中复习)(已下线)2019年9月24日 《每日一题》必修5—— 不等关系与不等式(2)沪教版(上海) 高三年级 新高考辅导与训练 第二部分 走近高考 第四章 数列与数学归纳法高考题选(已下线)第26讲 数列求和及数列的综合应用-2021年新高考数学一轮专题复习(新高考专版)(已下线)专题09 数列与数学归纳法-2021年浙江省高考数学命题规律大揭秘【学科网名师堂】(已下线)专题05 数列-十年(2012-2021)高考数学真题分项汇编(浙江专用)(已下线)专题28 证明不等式的常见技巧-学会解题之高三数学万能解题模板【2022版】(已下线)4.1数列的概念B卷(已下线)第三篇 数列、排列与组合 专题5 迭代数列与极限 微点4 Stolz公式背景下的数列题(已下线)第三篇 数列、排列与组合 专题5 迭代数列与极限 微点5 迭代数列与蛛网图(已下线)专题11 数列前n项和的求法 微点5 裂项相消法求和(三)(已下线)专题14 类等差法和类等比法 微点1 类等差法和类等比法的主要类型(已下线)专题21 数列解答题(理科)-3
8 . 已知函数
.
(1)求函数
的单调区间;
(2)设函数
,若
,使得
成立,求实数
的取值范围;
(3)若方程
有两个不相等的实数根
,求证:
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/cbb7a074e73f4383b40f6b60ab1f3c0d.png)
(1)求函数
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/4dfe7770e9b843d0b9de4a245db8af7c.png)
(2)设函数
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/5c3896bfe92a4f33b8c8bedb4c1ec353.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/00de6d384406401687da5c5406018758.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/69860636440a488483ed8e8f17682baf.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/db5aa3f17d39400fa10c93cd01fbc916.png)
(3)若方程
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/f80abbd3db654f14bc34099aa0d3ebcb.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/5b6ad49ae7f045e188c072c076247848.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572122327072768/1572122333200384/STEM/3c8b785c3379467f99d9e38209f1538d.png)
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|
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2卷引用:2015届黑龙江省哈尔滨九中高三第三次高考模拟理科数学试卷
名校
9 . 设函数
在区间
上的导函数为
,
在区间
上的导函数为
,若区间
上
,则称函数
在区间
上为“凹函数”,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b0658f75ba95241cf44fb72cb1a6df.png)
在
上为“凹函数”,则实数m的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d4cd90a9671c1b4589a34d3538ff12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9747a6549da84473cae74bae57ec7d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9747a6549da84473cae74bae57ec7d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d4cd90a9671c1b4589a34d3538ff12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb9225b977dab891881fd3705a0586b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d4cd90a9671c1b4589a34d3538ff12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c8b456fa1f4738e09c0295642e9eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d4cd90a9671c1b4589a34d3538ff12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b0658f75ba95241cf44fb72cb1a6df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5358a108f04c1b57b24f7b0b1f325969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978db378a41f3cd1ff08daa5a772b011.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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11卷引用:黑龙江省双鸭山市第一中学2018-2019学年高二下学期期末考试数学(文)试题
黑龙江省双鸭山市第一中学2018-2019学年高二下学期期末考试数学(文)试题黑龙江省哈尔滨三中2017-2018学年高三上学期期中考试文科数学试题黑龙江省哈尔滨三中2017-2018学年高三上学期期中考试理科数学试题2015届山东省潍坊市高三上学期期中考试理科数学试卷2015届山东省潍坊市高三上学期期中考试文科数学试卷2016届江西省吉安市一中高三上学期期中考试文科数学试卷2016届江西省吉安市一中高三上学期期中考试理科数学试卷2015-2016学年福建上杭一中高二下培优补差理科数学试卷2015-2016学年陕西省汉台中学高二下期中理科数学试卷陕西省西藏民族学院附属中学2016-2017学年高二下学期期中考试数学(理)试题福建省永春县第一中学2017-2018学年高二下学期期中考试数学(理)试题