名校
解题方法
1 . 在平面直角坐标系中,确定若干个点,点的横、纵坐标均取自集合
,这样的点共有n个.
(1)求以这n个点中的2个点为端点的线段的条数;
(2)求这n个点能确定的直线的条数;
(3)若从这n个点中选出3个点分别为三角形的3个顶点,求这样的三角形的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109fea550364bb2aabef823b83ccb37c.png)
(1)求以这n个点中的2个点为端点的线段的条数;
(2)求这n个点能确定的直线的条数;
(3)若从这n个点中选出3个点分别为三角形的3个顶点,求这样的三角形的个数.
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2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28e4867492d6035296db5e28c6ed599.png)
(1)当
时,求
的零点;
(2)若
恰有两个极值点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28e4867492d6035296db5e28c6ed599.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4卷引用:重庆市第四十九中学校、江津第二中学校等九校2023-2024学年高二下学期5月联考数学试题
名校
解题方法
3 . 已知定义域为
的函数
的导函数为
,
,且
的图象如图所示,则
的值域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090a91e4f3c8930674f98a9fa527709b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35022f82a22ac117807acdf52591649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090a91e4f3c8930674f98a9fa527709b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 某公司为了解年研发资金
(单位:亿元)对年产值
(单位:亿元)的影响,对公司近8年的年研发资金
和年产值
(
,
)的数据对比分析中,选用了两个回归模型,并利用最小二乘法求得相应的
关于
的经验回归方程:
①
;②
.
(1)求
的值;
(2)已知①中的残差平方和
,②中的残差平方和
,请根据决定系数选择拟合效果更好的经验回归方程,并利用该经验回归方程预测年研发资金为20亿元时的年产值.
参考数据:
,
,
,
.
参考公式;刻画回归模型拟合效果的决定系数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de122ae929b1acaff321dec137622ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2928f2bf2a086d6301b5352f7ef1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ac190405449cba34174ed6705aa6ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718cfed01c71b2fc805d8d7100b91dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c676941ea413d829060d29befd59d554.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5292c735338a9c57f86b2b2442261bef.png)
(2)已知①中的残差平方和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f23c3d6eb2728ae5c1171eac969b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4515125add629aa249ac0e14f01b257.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194bfb08c0f47c01de5bfe5660d423a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788b03267c223ba0538552371aa1a31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748e20fa23b995da6aa1c5936bf38117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4cbe45f8c50795b37c9925414ea816.png)
参考公式;刻画回归模型拟合效果的决定系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c8cd473a8b5a8da1f04b5041e609b0.png)
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5 . 在棱长为 1 的正方体
中,已知
分别为线段
的中点,点
满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85789b7d63712c81dcc0fb60014bbb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b829ac65651fac7a19a0b837939c3ff.png)
A.当![]() ![]() |
B.当![]() ![]() ![]() |
C.![]() ![]() |
D.若![]() ![]() ![]() |
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2卷引用:重庆市乌江新高考协作体2023-2024学年高二下学期第二阶段性学业质量联合调研抽测(5月)数学试题
名校
解题方法
6 . (1)已知函数
,证明:
,
,
.
(2)已知函数
,定义:若存在
,
,使得曲线
在点
与点
处有相同的切线
,则称切线
为“自公切线”.
①证明:当
时,曲线
不存在“自公切线”;
②讨论曲线
的“自公切线”的条数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673207f6b77b8192d25463d071737b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bf60c5e8996d138198fe74f30ce520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da092efa74406128332df5a053685a8.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aba730d4e2ff4c9cc155446b3d12e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a93969738a9bb969f40cf587f1d5d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878fd4af5b8fff01627f560767e19b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4197070db34f0419b6d85eed4cec9fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
①证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
②讨论曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
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7 . 已知椭圆
:
的右焦点为
,过点
作
轴的垂线交椭圆
于点
.过点
作椭圆
的切线,交
轴于点
.
(1)求点
的坐标;
(2)过点
的直线(非
轴)交椭圆
于
、
两点,过点
作
轴的垂线与直线
交于点
,求证:线段
的中点在定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dfb290b1a84f670549554a0c988593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解题方法
8 . 已知
是各项均为正数的等差数列,其前
项和为
,满足
对任意的
成立.
(1)求
的通项公式;
(2)令
,记
为数列
的前
项和.证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/6947966790678dcf4a1c6b9d30f556b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deda945164283569437cda6976fe35ea.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d896c0ac826b417ab338050de7c837db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45deada38f235bf0efb327bc4477034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12993f88db04326b694efa635fc1ef33.png)
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9 . 在信道内传输0,1信号,信号的传输相互独立.发送0时,收到1的概率为
,收到0的概率为
;发送1时,收到0的概率为
,收到1的概率为
.
(1)重复发送信号1三次,计算收到1的次数
的分布列及期望;
(2)依次发送1,1,0,判断以下两个事件:①事件
:至少收到一个正确信号;②事件
:至少收到两个0,是否互相独立,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)重复发送信号1三次,计算收到1的次数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)依次发送1,1,0,判断以下两个事件:①事件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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解题方法
10 . 有
个编号分别为1,2,…,
的盒子,第1个盒子中有3个白球1个黑球,其余盒子中均为1个白球1个黑球,现从第1个盒子中任取一球放入第2个盒子,再从第2个盒子中任取一球放入第3个盒子,以此类推,从第
个盒子中取到白球的概率是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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