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1 . 用篱笆在一块靠墙的空地围一个面积为
的等腰梯形菜园,如图所示,用墙的一部分做下底
,用篱笆做两腰及上底,且腰与墙成
,当等腰梯形的腰长为多少时,所用篱笆的长度最小?并求出所用篱笆长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8fbf64cd29a08ae703e9fa2035f3c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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2 . 已知椭圆C的标准方程为
,梯形
的顶点在椭圆上.
(1)已知梯形
的两腰
,且两个底边
和
与坐标轴平行或在坐标轴上.若梯形一底边
,高为
,求梯形
的面积;
(2)若梯形
的两底
和
与坐标轴不平行且不在坐标轴上,判断该梯形是否可以为等腰梯形?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)已知梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
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2卷引用:海南省2022-2023学年高二下学期学业水平期中考试数学试题
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3 . 对于平面向量
,定义“
变换”:
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8560ca9023cf64637ce1467f338556bd.png)
(1)若向量
,
,求
;
(2)已知
,
,且
与
不平行,
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d128ae3e21294e2eac5bcc775ccfb03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a18fd5445fb8a04b925a2745a56f613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddd9dc1110e60973b7b9e43bb1f9d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8560ca9023cf64637ce1467f338556bd.png)
(1)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea462b0382581d99c8bba51d9b79f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e186ebc624ebacde9a03b96289f1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22601439d36b6a93453d738c2b803eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc499d2e731df31957eeaa355bfbac4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63cf7e5f25165ccf0e24d32add179ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a176f300a2462e4f1ffef99d30c21e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e719e667f2783febbec38dea080b98.png)
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4 . 设向量
,
,
.
(1)求
;
(2)若
与
平行,求
的值;
(3)求证:
与
垂直;
(4)求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010632a752a68ced11aaf8ac2f3be311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe274c1abd217bba785a193f9a2ded1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbac0b7aae1810196fb8b2ac5a2861b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2def9368c3513ae1afb361b56dd06b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437dc907211c5934f938d869f6b19e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed521b8d2a27df838534e3b787b3dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20f69af6870bada879cddd7f6794d24.png)
(4)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b200e9fc16b3da9d38e37bb17d63b.png)
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解题方法
5 . 某农业大学组织部分学生进行作物栽培试验,由于土壤相对贫瘠,前期作物生长较为缓慢,为了增加作物的生长速度,达到预期标准,小明对自己培育的一株作物使用了营养液,现统计了使用营养液十天之内该作物的高度变化
(1)观察散点图可知,天数
与作物高度
之间具有较强的线性相关性,用最小二乘法求出作物高度
关于天数
的线性回归方程
(其中
用分数表示);
(2)小明测得使用营养液后第22天该作物的高度为
,请根据(1)中的结果预测第22天该作物的高度的残差.
参考公式:
.参考数据:
.
天数x | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
作物高度y/cm | 9 | 10 | 10 | 11 | 12 | 13 | 13 | 14 | 14 | 14 |
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71e4380679fd205681c8b1b236d41a5.png)
(2)小明测得使用营养液后第22天该作物的高度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5dad2b4a562753fcb95528c39974307.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446c21b8025405469a473aa0b32f9373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64807b93c3d7362d3c4fdcef87b29e39.png)
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2024-04-05更新
|
3204次组卷
|
10卷引用:模块三 专题1 大题分类练(线性回归)(北师大高二)
(已下线)模块三 专题1 大题分类练(线性回归)(北师大高二)湖南省株洲市炎陵县2023-2024学年高二下学期4月素质质量检测数学试卷华大新高考联盟2024届高三4月教学质量测评文科数学试题(老教材全国卷)华大新高考联盟2024届高三4月教学质量测评理科数学试题(老教材全国卷)河南省信阳市第一高级中学(华大新高考联盟)2024届高三4月教学质量测评数学试题湖北省华中师范大学第一附属中学、湖南省湖南师范大学附属中学等三校2024届高三下学期4月模拟考试(二模)数学试卷(已下线)8.2.1一元线性回归模型+8.2.2一元线性回归模型 第二练 强化考点训练四川省眉山市仁寿第一中学校南校区2023-2024学年高二下学期4月数学滚动检测卷河南省信阳市信阳高级中学2024届高三下学期4月二模数学试题(已下线)专题12 学科素养与综合问题(解答题17)
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解题方法
6 . 2024年3月12日是我国第46个植树节,为建设美丽新重庆,重庆市礼嘉中学高二年级7名志愿者参加了植树节活动,3名男生和4名女生站成一排.(最后答案用数字作答)
(1)甲不在中间也不在两端的站法有多少种?
(2)男、女相间的站法有多少种?
(3)甲、乙、丙三人从左到右顺序一定的站法有多少种?
(1)甲不在中间也不在两端的站法有多少种?
(2)男、女相间的站法有多少种?
(3)甲、乙、丙三人从左到右顺序一定的站法有多少种?
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2024-04-01更新
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3卷引用:浙江省绍兴市上虞区华维外国语学校2023-2024学年高二上学期期中考试数学试卷
7 . 设数列
,
为
的满足下列性质
的排列
的个数,性质T:排列中仅存在一个
,使得
.
(1)求
的值,并写出
时其中一种排列的情形.
(2)若
,求满足性质
的所有排列的情形.
(3)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b3c6f8a0d8adcd7bb9cb3d0214c8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7b19b82b9c52bccc2d326c151962da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535577e9213fa6b2a2bed70460fc4077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6bc6e1861d56ea5eb320e6c569338e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8800620cdf97b3db972d64ab8e4886.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2f1c1409a06278e847e6b573cef254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368691ff6590140094865d9a7a702d09.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03a70f7cba93600ed0a3164efadbcc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
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8 . 基本不等式是高中数学的重要内容之一,我们可以应用其解决数学中的最值问题.
(1)已知
,
R,证明
;
(2)已知
,
,
,
R,证明
,并指出等号成立的条件;
(3)已知
,
,
,
,证明:
,并指出等号成立的条件.
(4)应用(2)(3)两个结论解决以下两个问题:
①已知
,证明:
;
②已知
,
,且
,求
的最小值.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1f5facca1d0db44613d7c690bc90aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267cd7062303bbe8d8a4bd8dd48fef2e.png)
(2)已知
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7701d084d2b153bbea08cfbf63413a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61d582437402db050313612348dfa27.png)
(3)已知
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d51126fd77ba262607809563550b48f.png)
(4)应用(2)(3)两个结论解决以下两个问题:
①已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5acd1467c10c7ff14caca53feea7a540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d49468bf449d201b533f5f8f9e9add1.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983154ee44321cef8eb8213bd862c70d.png)
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2024-02-10更新
|
137次组卷
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2卷引用:云南省昆明市官渡区第五中学2023-2024学年高一上学期期中测试数学试卷
22-23高三下·北京海淀·开学考试
名校
解题方法
9 . 若无穷数列
的各项均为整数.且对于
,
,都存在
,使得
,则称数列
满足性质P.
(1)判断下列数列是否满足性质P,并说明理由.
①
,
,2,3,…;
②
,
,2,3,….
(2)若数列
满足性质P,且
,求证:集合
为无限集;
(3)若周期数列
满足性质P,求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9672f1800f9544e878955f289aa3fc6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f2c7c9305b404f7363a376af101aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa38a89b95fa1ea7bfc91630f6c7437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0fbad04faddb5408ce4e7e6e3ed816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)判断下列数列是否满足性质P,并说明理由.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80c1ed7b10ac7ca1cd81cdd39a8fcc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ce6401cf48b9546342b1b96ac2cc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
(2)若数列
![](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/f224a5a66c91792eceb8f8c725183f67.png)
(3)若周期数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2024-02-10更新
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1548次组卷
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14卷引用:北京市海淀区中国人民大学附属中学2022-2023学年高二下学期期中数学复习试题(2)
北京市海淀区中国人民大学附属中学2022-2023学年高二下学期期中数学复习试题(2)(已下线)北京市海淀区清华大学附属中学2023届高三下学期开学调研测试数学试题北京市第五中学2023届高三下学期3月检测数学试题北京市海淀区教师进修学校附属实验学校2023届高三零模数学试题(已下线)2023年北京高考数学真题变式题16-21北京市清华大学附属中学2023届高三下学期4月月考数学试题北京市海淀区首都师范大学附属中学2023-2024学年高三上学期阶段练习(1月)数学试题(已下线)北京市第四中学2023-2024学年高三下学期开学考试数学试题湖南省2024届高三数学新改革提高训练一(九省联考题型)2024届高三新改革数学模拟预测训练一(九省联考题型)湖南省张家界市民族中学2023-2024学年高二下学期入学考试数学试题(已下线)压轴题05数列压轴题15题型汇总-1北京市顺义区第一中学2024届高三下学期高考考前适应性检测数学试卷广东省广州市执信中学2024届高三下学期教学情况检测(二)数学试题
10 . 已知直线
方程为
,点
,点
到点
的距离与到直线
的距离之比为
,
.
(1)求点
的轨迹
的方程(用
表示);
(2)若斜率为
的动直线
与(1)中轨迹
交于点
,
,其中
,
.点
(
)在轨迹
上,且直线
、
与
轴分别交于
、
两点,若恒有
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e756c89b600e37dfb36bb22ef28eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24550b13dbecf7d86c7054250e987274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4cc00c283519973f7f8e1274b5c733.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6270bb08b90f72d5671ab8225f356c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe3251e054fe97089806ba7033f802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891fe97a26ca688e22e5d704432f764b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b170470d02c85c1be9a3faff5eca0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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