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1 . 定义函数
,设区间
的长度为
,则不等式
解集区间的长度总和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad35753860ae3c07ee847f90556c484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64da75a02173c2a5eb40f4c68d0f4f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
A.5 | B.6 | C.![]() | D.![]() |
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2 . 某植物的生长高度
(单位:厘米)和栽培时间
(单位:周)的统计数据如下,采用最小二乘估计得到的线性回归方程为
,若
时,残差
等于
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d736d42f05151352c4e7cd48b202bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b836116dbde89c1661ac5a8f7f50c4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![]() | 1 | 2 | 3 | 4 | 5 |
![]() | 9 | 16 | ![]() | 24 | 30 |
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知函数
,其部分图象如图所示,且直线
与曲线
所围成的封闭图形的面积为
,下列叙述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27cd15ee656d39a864fbecf781f23c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc06945468c5aaa0766fa7d6db32e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f29c3f63b8d190bae8abeb2036f4a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
A.![]() |
B.![]() |
C.![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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2024高三·全国·专题练习
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解题方法
4 . 已知向量
,
,
,
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150d9c357f2f8f8deecacd3ef0545cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcad49be70d78e1e475d77c9d64d617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41910605980fe3f71b60a50e15e97023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdf6f4e96b231e2802b5d6059451534.png)
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2024-06-03更新
|
574次组卷
|
5卷引用:安徽省马鞍山市第二中学2023-2024学年高二上学期开学检测数学试题
安徽省马鞍山市第二中学2023-2024学年高二上学期开学检测数学试题(已下线)专题10 平面向量(理科)-2(已下线)专题9 平面向量(文科)-1陕西省商洛市柞水中学2024届高考仿真模拟考试数学(理科)试题陕西省柞水中学2024届高考仿真模拟考试数学(文科)试题
解题方法
5 . 如果X,Y是两个离散型随机变量,
的所有可能取值为:
,则称
为
在
事件下的条件期望.已知甲每次投篮的命中率均为
,其中
,设随机变量
是甲第一次命中时的投篮次数,随机变量
是甲第二次命中时的投篮次数.
(1)若
,求
;
(2)已知
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6a5dc4ce8f36f14dae312835cff836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a71f2ff30791e8b210727912600096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f970f380a12c843bb4a74ff34a15b2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25b322e9f1f8a3aedd48a01e0af8290.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed47b0d53fbc16d55c3921ab7b67d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2fb32c2cb5bc9bbfb421f5747d2c27.png)
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6 . 已知S是全体复数集
的一个非空子集,如果
,总有
,则称S是数环.设
是数环,如果①
内含有一个非零复数;②
且
,有
,则称
是数域.由定义知有理数集
是数域.
(1)求元素个数最小的数环
;
(2)证明:记
,证明:
是数域;
(3)若
是数域,判断
是否是数域,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9862bd95f5984d277bffec774aaf04eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4034552829008c1daaee2701d2afe8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add287d65098cf6afc04da8d55c8e2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb0cbda87a5e26ceb063d749533eb58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c412d5329ba909164329663b7eecdfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c4892e431f6bd8f9dfb7b593653b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ecb1589c3cc179e2f62507020771e.png)
(1)求元素个数最小的数环
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4defd79134fced9d2beaba395d4994dd.png)
(2)证明:记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b23f5d67f2aed1d240a62c192fe97f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca8142445fb86f9404c814a8067db48.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfa8cb6d43bc7fbec75c27b6285fff.png)
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解题方法
7 . 把一条线段分割为两部分,使较长部分的长度与全长的比值等于较短与较长部分的长度的比值,这个比值称为黄金分割比(简称黄金比).黄金比在建筑、艺术和科学等领域中都有广泛应用.我们把顶角为
的等腰三角形称为黄金三角形,它满足较短边与较长边的长度之比等于黄金比.由上述信息可求得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bef7ce8a5dc9f61a9a795e41030432.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e411abb2d185fa546789b89e0fa5c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bef7ce8a5dc9f61a9a795e41030432.png)
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解题方法
8 . 下列命题正确 的有( )
A.已知直线l过点![]() ![]() ![]() |
B.数列![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.已知函数![]() ![]() ![]() ![]() |
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解题方法
9 . 过点
作直线l与双曲线C:
交于A,B两点,P是双曲线C的左顶点,直线
与y轴分别交于
.
(1)求直线l斜率的取值范围;
(2)求证:线段
的中点M为定点,并求出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef7883f9b72effd33bda22f803789ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2724acdc1cbf15077b0b0295ab21a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ca00309261a540934d9b3ed9ba05b6.png)
(1)求直线l斜率的取值范围;
(2)求证:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
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解题方法
10 . 已知椭圆
:
(
).
(1)若椭圆
的焦距为6,求
的值;
(2)设
,若椭圆
上两点M,N满足
,求点N横坐标取最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6e9badea4fda62bdbfa1ae44107fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be362dec96173f246ff747264007817.png)
(1)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d5450b9ec0e906919efbb87e5a9e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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