解题方法
1 . 车胎凹槽深度是影响汽车刹车的因素,汽车行驶会导致轮胎胎面磨损.某实验室通过实验测得轿车行驶里程与某品牌轮胎凹槽深度的数据,如下表所示:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b62a4febe4b8f10e6a45e4e45e9e5fc.png)
(1)求该品牌轮胎凹槽深度
与行驶里程
的相关系数
,并判断二者之间是否具有很强的线性相关性;(结果保留两位有效数字)
(2)根据我国国家标准规定:轿车轮胎凹槽安全深度为
(当凹槽深度低于
时刹车距离增大,驾驶风险增加,必须更换新轮胎).某人在保养汽车时将小轿车的轮胎全部更换成了该品牌的新轮胎,请问在正常行驶情况下,更换新轮胎后继续行驶约多少公里需对轮胎再次更换?
附:变量
与
的样本相关系数
;对于一组数据
,
,其线性回归方程
的斜率和截距的最小二乘估计分别为:
.
行驶里程![]() ![]() | 0.0 | 0.4 | 1.0 | 1.6 | 2.4 | 2.8 | 3.4 | 4.4 |
轮胎凹槽深度![]() | 8.0 | 7.8 | 7.2 | 6.2 | 5.6 | 4.8 | 4.4 | 4.0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b62a4febe4b8f10e6a45e4e45e9e5fc.png)
(1)求该品牌轮胎凹槽深度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)根据我国国家标准规定:轿车轮胎凹槽安全深度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2de5cea06186ed9221559d81a7697e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2de5cea06186ed9221559d81a7697e8.png)
附:变量
![](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/6be3ab96c035d1d6615b0f119280be1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c1570d69124af08a4036473f93eacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92abae836b8026511113ad8c3ea23028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76c7294338149b6a7b92f11e9e87bd2.png)
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2 . 已知角
的终边经过点P
,求下列各式的值.
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880b7992d10ec6af9169c97da33c3ae8.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875f7614a771141f5365a5ee56e1cd0c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ccbbee4812bb88f7820927d03b9f20.png)
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解题方法
3 . (1)直线
与直线
平行,求
的值;
(2)直线
与直线
垂直,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f997553ed7c4a80a7de20d3d1b154ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3803c06192428c33c5eefe0e8db62b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615cc10be68f43265fcbcbfd00161494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457d4ac7881bcc2fcac9c5467f8f06e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 已知等差数列
的各项均为正数,
.
(1)求数列
的通项公式;
(2)若数列
满足
,求
的通项公式及其前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0503dd6a111356f63a52d4f59ae56fc.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177c4faa4f3fe728621d1478217938ac.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/08eb71ecf8d733b6932f4680874dbbf3.png)
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2024-02-27更新
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3卷引用:江西省九江市第一中学2023-2024学年高二下学期4月月考数学试题
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5 . 已知函数
.
(1)求
的定义域,并判断函数
的奇偶性;
(2)用定义证明函数
在
上是增函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccf7e6d6f81cd2a643d0dc4a8fc0ac1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)用定义证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
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解题方法
6 . 在中,角
,
,
所对的边分别为
,
,
,且
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e27102d9badb0b4e124753e186d43c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2023-11-20更新
|
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5卷引用:江西省九江第一中学2023-2024学年高二上学期期中考试数学试卷
江西省九江第一中学2023-2024学年高二上学期期中考试数学试卷江西省新余市实验中学2023-2024学年高二上学期12月月考试数学试题黑龙江省哈尔滨市哈工大附中2023-2024学年高二上学期期末数学试题广东省揭阳市揭东区2023-2024学年高二上学期1月期末数学试题(已下线)第六章 平面向量及其应用 单元复习提升(1)-单元速记·巧练(人教A版2019必修第二册)
名校
解题方法
7 . 已知抛物线
的焦点为
,抛物线上一点
横坐标为
,且点
到焦点
的距离为
.
(1)求抛物线
的方程;
(2)过点
作直线交抛物线于点
,求
面积的最小值(其中
为坐标原点).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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2023-11-20更新
|
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3卷引用:江西省九江第一中学2023-2024学年高二上学期期中考试数学试卷
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8 . 化简或计算下列各式.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db040dd7f71389c18e001acfff00633f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24ae040f2a9df62427cf32c1b36d8fd.png)
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2023-11-19更新
|
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3卷引用:江西省九江市浔阳区九江一中2023-2024学年高一上学期期中数学试题
解题方法
9 . 已知集合
.
(1)当
时,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106fd546ae921fd6a19dd758ebc13be3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361048fd1b1a7f3b7230404a04b7155a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
10 . 函数
的定义域为集合A,集合
·
(1)若
,求集合
;
(2)设
,
,若Q是P的必要条件,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cbeb07b713ab91bb95b28891b037f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee7a9828ab772ce75c049a0fb5c2db.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb17a2a90cd479b604258d1258e9636.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c205e4fac090fa117028a19cf0007b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0297339390d194e4aa609415595ead4f.png)
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