1 . 已知函数
的定义域为
,若存在常数
,使得
对所有实数
均成立,则称函数
为“期望函数”,给出下列函数:
①
;②
;③
;④
;
其中为“期望函数”的是__________ .(写出所有正确的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7b11c8322cf492838e3e177ad0376a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d45e9bb438a011f890a8827795aad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee40803bfd576cf49b85c8b567fc5b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b383f0f54f015453a3bbb29614df7d.png)
其中为“期望函数”的是
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3卷引用:2017届黑龙江省哈尔滨市第三中学高三二模考试数学(理)试卷
名校
2 . 设
,曲线
在点
处的切线与直线
垂直.
(1)求
的值;
(2)若对于任意的
,
恒成立,求
的取值范围;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613decb3b6a48dcc5ed9cd11412bc32c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a3365e99f926b1dafa901ab232152.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4318a47d7e83d587e74bab4d3d1f6883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519ca67eb9570d0c256affadb48eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf4f665589ad79bc9ecd3fdf382d356.png)
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2017-02-21更新
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5卷引用:2017届湖北省荆、荆、襄、宜四地七校考试联盟高三2月联考数学(理)试卷
3 . 已知函数
,其中
表示不超过
的最大整数.设
,定义函数
:
,
,
,
,则下列说法正确的有个
①
的定义域为
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007e11a7aca5c7c2010cb5f293241f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fab6009ffb15a88bd843a1c2b8d7770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b4ceef651d43872a078d48092417d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ab7bb40f58f28c9799b20f91d15d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0bbd7348fb5732ad5909ded82b592f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c11ed584970ab7c02e165616372825e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cacb07371f50077943e934c6a46fbf14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aaaa2c7d07859ebef83c124b2220ce1.png)
②设,
,则
;
③;
④若集合,则
中至少含有
个元素.
A.![]() | B.![]() | C.![]() | D.![]() |
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2017届湖北省荆、荆、襄、宜四地七校考试联盟高三2月联考数学(理)试卷(已下线)2019年一轮复习讲练测【新课标版理】专题2.2 函数的定义域、值域式(测)(已下线)2019年一轮复习讲练测【新课标版文】专题2.2 函数的定义域、值域式(测)湖南省长沙市宁乡县第一高级中学2019-2020学年高一上学期期中数学试题江西省南昌市实验中学2021届高2月月考数学(理)试题(已下线)专题1 分段函数问题(过关集训)(高三压轴题全攻略)湖南省永州市第一中学2021-2022学年高二下学期第三次月考数学试题
4 . 已知在
中,
,
,如图,动点
是在以
点为圆心,
为半径的扇形内运动(含边界)且
;设
,则
的取值范围__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf33aa3d1fbed7a3ba2983f1ed27451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e32a859e1616f7a7e4202d58d030794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2010b44225d512da35649f01a95e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886c25cbaff27a9c4cf52dacec0eac4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b461cbe5a345727bc752ef8a063cf7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625395433480192/1626594733916160/STEM/724ec2f0-7675-4ae1-81b9-f6f9718c014f.png)
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名校
5 . 已知函数
是定义在
上的奇函数,当
时,
,若
,
,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe6db41eb917fbe913b77dcbcc27893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f2d3c8ac808689ec9b967bb4105d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:2017届江西省上饶市高三第一次模拟考试文数试卷1
解题方法
6 . 已知数列
满足
,
.
(1)若
,求证数列
是等差数列;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b79d01e1674d7105f5a9625186f5ff.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87743e3348c037162aa605bb6bb2220c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d27884f5e62dda8dd97ecb5d62f86a0.png)
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7 . 如图,在平面四边形
中,已知
分别是棱
的中点,若
,设
,则
的最大值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a337a934b801730321f67b0e5a0b144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207551e47a49ebdf447aab8cba24e560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0048a0a64059e3025b004671a1f1cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5e3d14fb4911c1f590fe518df1fa4b.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573135574802432/1573135581093888/STEM/691841b9b8c94b31b31320742ac01ab3.png?resizew=260)
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名校
8 . 已知函数
的定义域为
,当
时,
,对任意的
,
成立,若数列
满足
,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edae93ec9de65d7e8afd2a53063c8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb10b0dea5e3bca446aeef2527a984c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01d3a735f9848d5d727482a7f56d3ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca790dadf48161dd1f023f36aea11de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475fdc2128fcc98e4bfe451fd1f49120.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-04更新
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2017届河北沧州市高三9月联考数学(理)试卷【市级联考】甘肃省张掖市2019届高三第三次诊断考试数学(文)试题上海市实验学校2017-2018学年高三下学期第五次3月月考数学试题(已下线)专题3.3 数列与函数、不等式相结合问题 -玩转压轴题,进军满分之2021高考数学选择题填空题
9 . 已知椭圆
的两个焦点为
,动点P在椭圆上,且使得
的点P恰有两个,动点P到焦点的
的距离的最大值为
.
(1)求椭圆
的方程;
(2)如图所示,以椭圆
的长轴为直径作圆
,过直线
上的动点T作圆
的两条切线,设切点分别为A,B.若直线AB与椭圆
交于不同的两点C,D,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/d9c9c96b897d452b8d2dc40941c0624b.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/5b54e7c9c26544ca9f4fbe5b8596b659.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/2a320ef8c5334dc88a150fb4fae543ca.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/298853ea62654db6be70ee1b22ebc55f.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/6ae49efa623c414fb70e5ad04e3721fb.png)
(1)求椭圆
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/70e1030a844c45f2880f92dac5ef45d8.png)
(2)如图所示,以椭圆
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/70e1030a844c45f2880f92dac5ef45d8.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/85ebc1461dbf40a9a1dadeb26b1830c2.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/1fe7f4021f3847bd83be4b6b7dbed5c0.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/85ebc1461dbf40a9a1dadeb26b1830c2.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/70e1030a844c45f2880f92dac5ef45d8.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/3fa110b071904081b4562503f02fa472.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572969915473920/1572969921462272/STEM/b469e382c523407a8a50f0dd493eaef8.png)
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10 . 某工厂欲加工一件艺术品,需要用到三棱锥形状的坯材,工人将如图所示的长方
材料切割成三棱锥
.
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572883895296000/1572883900850176/STEM/1450807eaf854de487145d59f60ef73f.png)
(Ⅰ)若点
分别是棱
的中点,点
是
上的任意一点,求证:
;
(Ⅱ)已知原长方体材料中,
,
,
,根据艺术品加工需要,工程师必须求出该三棱锥的高;
(i)甲工程师先求出
所在直线与平面
所成的角
,再根据公式
求出三棱锥
的高
.请你根据甲工程师的思路,求该三棱锥的高;
(ii)乙工程师设计了一个求三棱锥的高度的程序,其框图如右图所示,则运行该程序时乙工程师应输入的
的值是多少?(请直接写出
的值,不要求写出演算或推证的过程)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6e2c5a15ee96de5510c38f68069f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f08e3fae189d0de5cb992e4007fca9.png)
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572883895296000/1572883900850176/STEM/1450807eaf854de487145d59f60ef73f.png)
(Ⅰ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7878423936bda0d3fe504c4cd81bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a9d8b29c7c25bf005c8fa849212eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb949f2a7ee89566c5c02b75043f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffc708961cf03f696473e68986b7dd1.png)
(Ⅱ)已知原长方体材料中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827064e34563a7f678020ee1fa9b1683.png)
(i)甲工程师先求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5f8d58ee8a1fca928c91bc384d014a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f08e3fae189d0de5cb992e4007fca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(ii)乙工程师设计了一个求三棱锥的高度的程序,其框图如右图所示,则运行该程序时乙工程师应输入的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572883895296000/1572883900850176/STEM/1d4dbe7a351a4097b41c15db6f6744d6.png)
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