1 . 设A,B是两个非空集合,如果对于集合A中的任意一个元素x,按照某种确定的对应关系
,在集合B中都有唯一确定的元素y和它对应,并且不同的x对应不同的y;同时B中的每一个元素y,都有一个A中的元素x与它对应,则称
:
为从集合A到集合B的一一对应,并称集合A与B等势,记作
.若集合A与B之间不存在一一对应关系,则称A与B不等势,记作
.
例如:对于集合
,
,存在一一对应关系
,因此
.
(1)已知集合
,
,试判断
是否成立?请说明理由;
(2)证明:①
;
②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acae4bf2a6bead9d904b70d0480fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0915685a3eae67d5c6bc3bd722030876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79aedd00413c6ff9b2696a63a854867.png)
例如:对于集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aac2c0e4c6fc7ae8950a38098cb062f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794b3ea2ca1d6d2b70dcec2a991dd3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210402b31fd895e4fd6921cb25c1ee88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0915685a3eae67d5c6bc3bd722030876.png)
(1)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf4f47caab35fc473167ca17c7b5f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae2c499889a4619a5102a4b2e6b8129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e386b0005c8f091434060361a07955d8.png)
(2)证明:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06ec5553f5aeef37ec8ca6f0d9caba8.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229c5c40da18cb86a81e709d802d4c1e.png)
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2024-04-18更新
|
938次组卷
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4卷引用:浙江省台州市2024届高三下学期第二次教学质量评估数学试题
浙江省台州市2024届高三下学期第二次教学质量评估数学试题(已下线)压轴题01集合新定义、函数与导数13题型汇总 -1河北省名校联盟2024届高三下学期4月第二次联考数学试题 (已下线)情境10 存在性探索命题
名校
2 . 定义:若函数
图象上恰好存在相异的两点
满足曲线
在
和
处的切线重合,则称
为曲线
的“双重切点”,直线
为曲线
的“双重切线”.
(1)直线
是否为曲线
的“双重切线”,请说明理由;
(2)已知函数
求曲线
的“双重切线”的方程;
(3)已知函数
,直线
为曲线
的“双重切线”,记直线
的斜率所有可能的取值为
,若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ece491f9ba053a2ead5ad54138d779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d430e6eb5f8b43723db095937fbc74f7.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5776b27d76690a67770d954a47bfb0f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6f04900fb8400a415b1067320a2f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e540ef465ca68c186cc972d54d3a268e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6b9ccddda8585a04f8ab4d4b4583a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a097fa8e3bfa45de1ea35f1ad907fe3.png)
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2024-04-17更新
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5卷引用:河北省邢台市2024届高三下学期教学质量检测(一)数学试题
河北省邢台市2024届高三下学期教学质量检测(一)数学试题(已下线)模块五 专题5 全真拔高模拟5(苏教版高二期中研习)辽宁省辽阳市2023-2024学年高三下学期二模数学试卷(已下线)专题16 对数平均不等式及其应用【练】广西2024届高三4月模拟考试数学试卷
3 .
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8ec6fc551585f093d0a8848aace07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2829c117b291deabd43fdd524d253a26.png)
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解题方法
4 . 已知三棱锥
的各顶点均在半径为2的球
表面上,
,
,则三棱锥
的内切球半径为__________ ;若
,则三棱锥
体积的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418b19e808e7ac6acb2065b005595693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a621bfa70a014bdcdb58697f099b597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbddb854a1a634484936c64ab4a9102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5402d4268ec1028e5307063539c10d7.png)
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5 . 已知集合
,定义:当
时,把集合
中所有的数从小到大排列成数列
,数列
的前
项和为
.例如:
时,
,
.
(1)写出
,并求
;
(2)判断88是否为数列
中的项.若是,求出是第几项;若不是,请说明理由;
(3)若2024是数列
中的某一项
,求
及
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc6c83969f0c67473049709952b50e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d47710bdf547780bc9c29c42423cce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b33a624f32310f1ef43686ea593ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b33a624f32310f1ef43686ea593ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd390fa43014ff48549a6ca941d38c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2046390ed7657e860458b026a4ced115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ac0dba37b8eb22670b24c350af0b54.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae09a97dd40d6b317a448664bf3816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5f4584826926dbc15fae9fb75d36ec.png)
(2)判断88是否为数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59038077a6db85e9b790b14eecf717a.png)
(3)若2024是数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b33a624f32310f1ef43686ea593ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1180a64221e78248cb691ecc21ec18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e05ea594b5b86bcbbad940b46000f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9c79f3f90e6ed44e479b2e4ff16f05.png)
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2024-04-17更新
|
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5卷引用:第四套 艺体生新高考全真模拟 (二模重组卷)
(已下线)第四套 艺体生新高考全真模拟 (二模重组卷)(已下线)压轴题08计数原理、二项式定理、概率统计压轴题6题型汇总(已下线)压轴题01集合新定义、函数与导数13题型汇总-2天津市南开中学2024届高三下学期模拟检测数学试题2024届浙江省嘉兴市二模数学试题
6 . 已知双曲线
与曲线
有4个交点
(按逆时针排列)
(1)当
时,判断四边形
的形状;
(2)设
为坐标原点,证明:
为定值;
(3)求四边形
面积的最大值.
附:若方程
有4个实根
,
,
,
,则
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da601fb83011f1f6bf8a60b1d3a6a6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731809d4e06dfcdb73811b99da26f00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c43f86ecb6bb6dfb3331b26d957d59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5325019987094e4b36570319fdf1a9.png)
(3)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
附:若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdf06ae0fe7b5de03c3d1d68270fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec413484532aa969f9cfa4b90adc004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b271fb5eff2dcde48ea2a9a7c580f621.png)
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解题方法
7 . 已知函数
(
),
.
(1)求函数的极值;
(2)若
对任意的
恒成立,求实数
的取值范围;
(3)求证:
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0efa793fc95d2bbcc8eec1d375343f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c9e984f50dac827078864092aa9a7bc.png)
(1)求函数的极值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5822ea5f9009e579f59f011db39196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5816f5a4a74bbf091588680f9885b829.png)
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名校
8 . 已知函数
.
(1)讨论
的单调区间;
(2)已知
,设
的两个极值点为
,且存在
,使得
的图象与
有三个公共点
;
①求证:
;
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c492c78c373aed6e3cead643bd37b7.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6381d9d11871e191fe56acc5da3b7512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30f80d975da401b4a7686c5f8729d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726c078ca626f64e0d02c2666d8af105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af79f45b5880c72a349500da9d8e118d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f2c9ba604e34100159eb10cccd2b04.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b944d88dca9ab78783743050d2d41f.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69af9eb933b28534cd97ad949e8bb398.png)
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名校
9 . 函数
(a,
),下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ceea9d135b90f75c765733582c99b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
A.当![]() ![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024-04-16更新
|
364次组卷
|
3卷引用:专题11 不等式恒成立、能成立、恰好成立问题(过关集训)
(已下线)专题11 不等式恒成立、能成立、恰好成立问题(过关集训)黑龙江省哈尔滨市第六中学2023-2024学年高二下学期期中考试数学试卷山东学情2023-2024学年高二下学期第一次阶段性调研数学试题(A卷)
2024·全国·模拟预测
10 . 在参数估计的各种方法中极大似然估计法是应用最为广泛的一种估计方式,它广泛运用在金融、工程、生物制药等领域.把使样本事件发生概率最大的参数值,作为总体参数的估计值,就是极大似然估计.求极大似然估计的一般步骤:(1)由总体分布导出样本的联合概率函数(或联合密度);(2)把样本联合概率函数(或联合密度)中自变量看成已知常数,而把参数
看作自变量,得到似然函数
;(3)求似然函数
的最大值点(常转化为求对数似然函数
的最大值点);(4)在最大值点的表达式中,用样本值代入就得参数的极大似然估计值.已知服从正态分布
的样本中参数
的似然函数为
;服从二项分布的似然函数为
(其中
表示成功的概率,
为样本总数,
为成功次数),则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6eb532cf48aa754a0a0731a88c731b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6eb532cf48aa754a0a0731a88c731b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6eb532cf48aa754a0a0731a88c731b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bcc248a7770a16fa10fc4602d71e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dc0c4d9a68ca8ce797958f9084fd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a145eb64d3aff50cb9ced87c4703b7b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a7881f1f724495a233bdcebdd96ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() ![]() |
B.参数![]() ![]() |
C.参数![]() ![]() |
D.二项分布中成功的次数与不成功的次数之比的极大似然估计值为![]() |
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