名校
1 . 如图,在
的正方形网格中,
都是格点,
为圆
的直径,
在圆
上,请仅用无刻度直尺完成下列作图(保留作图痕迹)
(1)作点
关于直线
的对称点
;
(2)直接标出弦
的中点及圆
的圆心
,并作
弧的中点
;
(3)在射线
上作点
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd557c3ac7908fe535f678a50361b820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/e5d1f9a5-5225-4d65-b6b0-3d0bbf83826f.png?resizew=166)
(1)作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)直接标出弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ea3fb90a170f7e4c3b6fae814c3721.png)
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解题方法
2 . 某企业为了增收节支,设计了一款成本为20元/件的工艺品投放市场进行试销. 经过调查,得到如下数据:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/b9369bea-ef24-457e-be6d-f0bcae2a5ef3.png?resizew=169)
(1)把上表中
的各组对应值作为点的坐标,在下面的平面直角坐标系中描出相应的点,根据所描出的点猜想
是
的什么函数,并求出函数关系式;
(2)当销售单价定为多少时,工艺厂试销该工艺品每天获得的利润最大?最大利润是多少?(利润=销售总价-成本总价)
(3)为了支持希望工程,在实际的销售过程中该公司决定每销售一件工艺品就捐
元给希望工程,公司通过销售记录发现,当销售单元价不超过51元/件时,每天扣除捐赠后的日销售利润随销售单价
的增大而增大,求
的取值范围.
销售单价 | … | 30 | 40 | 50 | 60 | … |
明天销售量 | … | 500 | 400 | 300 | 200 | … |
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/b9369bea-ef24-457e-be6d-f0bcae2a5ef3.png?resizew=169)
(1)把上表中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baeaaab224679fcc45049e10ba0c23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当销售单价定为多少时,工艺厂试销该工艺品每天获得的利润最大?最大利润是多少?(利润=销售总价-成本总价)
(3)为了支持希望工程,在实际的销售过程中该公司决定每销售一件工艺品就捐
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cefb34453936e220c74220896a14da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 某校为了提高学生安全意识,利用自习课时间开展“防溺水”安全知识竞赛(满分150分),加强对学生的安全教育,通过知识竞赛的形式,不仅帮助同学们发现自己对“防溺水”知识认知的不足之处,还教会了同学们溺水自救的方法,提高了应急脱险能力.现抽取了甲组20名同学的成绩记录如下:甲:92,96,99,103,104,105,113,114,117,117,121,123,124,126,129,132,134,136,141,142.抽取了乙组20名同学的成绩,将成绩分成[100,110),[110,120),[120,130),[130,140),[140,150]五组,并画出了其频率分布直方图.
(2)估计乙组20名同学成绩的平均分(同组中的每个数据用该组区间的中点值代表替);
(3)现从甲乙两组同学的不低于140分的成绩中任意取出2个人的成绩,求取出的2个人的成绩不在同一组的概率.
(2)估计乙组20名同学成绩的平均分(同组中的每个数据用该组区间的中点值代表替);
(3)现从甲乙两组同学的不低于140分的成绩中任意取出2个人的成绩,求取出的2个人的成绩不在同一组的概率.
您最近一年使用:0次
2022-07-08更新
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727次组卷
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4卷引用:湖北省宜昌市部分省级示范高中2023-2024学年高二上学期11月月考数学试卷
4 . 现有下列三个条件:
①函数
的最小正周期为
;
②函数
的图象可以由
的图象平移得到;
③函数
的图象相邻两条对称轴之间的距离
.
从中任选一个条件补充在下面的问题中,并作出正确解答.
已知向量
,
,
,函数
.且满足_________.
(1)求
的表达式,并求方程
在闭区间
上的解;
(2)在
中,角
,
,
的对边分别为
,
,
.已知
,
,求
的值.
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca2810eb34112a2e9101315c2b9c125.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
从中任选一个条件补充在下面的问题中,并作出正确解答.
已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeebf43ea76e1700a4df31d572baa89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a43481f1fe12c9ac064753be48db37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3bc6a618bc7d0906c686df3a374f2c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9e7131919449b3d2ebad852a1d78ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53496ae2397150370142b5195a1a39c.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f97ee9c0089e3c2796ec775d29870a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab4e9b450a64581df4250d5223f1960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
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2021-09-08更新
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1846次组卷
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6卷引用:湖北省二十一所重点中学2023届高三上学期第二次联考数学试题
名校
解题方法
5 . 从某小区抽100户居民进行月用电量调查,发现他们的月用电量都在50~350(度)之间,在进行适当分组(每组为左闭右开区间),并列出频率分分布表、画频率分布直方图后,将频率分布直方图的全部6个矩形上方线段的中点自左右的顺序依次相连,再删掉这6个矩形,就得到了如图所示的“频率分布折线图”.
![](https://img.xkw.com/dksih/QBM/2021/8/28/2795700543766528/2797527463886848/STEM/6d3f3325-ecc9-40d3-a193-1c8389530750.png?resizew=387)
(1)请画出频率分布直方图,并求出频率分布折线图
的值;
(2)请结合频率分布直方图,求月用电量落在区间
(度)内的用户的月用电量的平均数;
(3)已知在原始数据中,月用电量落在区间
(度)内的用户的月用电量的平均数为140(度),方差为1600,所有这100户的月用电量的平均数为188(度),方差为5200,且月用电量落在区间
(度)内的用户数的频率恰好与频率分布直方图中的数据相同,求月用电量在区间
(度)内的用户用电量的标准差.
(参考数据:
,
,
,
,
,
)
![](https://img.xkw.com/dksih/QBM/2021/8/28/2795700543766528/2797527463886848/STEM/6d3f3325-ecc9-40d3-a193-1c8389530750.png?resizew=387)
(1)请画出频率分布直方图,并求出频率分布折线图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)请结合频率分布直方图,求月用电量落在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee13b4d7c053036e5cbfff75be2eae4.png)
(3)已知在原始数据中,月用电量落在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee13b4d7c053036e5cbfff75be2eae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee13b4d7c053036e5cbfff75be2eae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f957b28a4bcd63cb6f291c7ab8d2557.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f9aa15a43d2209d66418088f4d5cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6b4669b95f798350d409a95fbb5c9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c3a6eb747b174faa1a21a5a98782fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75dc88ffd8cbc74c142eae326d818dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063a9d2fbbc238fd3587aae05db3e7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b707d1b95bce30671062d2a4a78bbe.png)
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2021-08-30更新
|
1604次组卷
|
7卷引用:湖北省武汉市华师一附中2020-2021学年高一下学期期末数学试题
湖北省武汉市华师一附中2020-2021学年高一下学期期末数学试题(已下线)第14章 统计(综合测试卷)-2021-2022学年高一数学10分钟课前预习练(苏教版2019必修第二册)(已下线)第九章 统计 章末测试(提升)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)重庆市长寿中学2021-2022学年高一下学期第三次月考数学试题(已下线)第13讲 用样本估计总体(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(已下线)高一下学期期末数学考试模拟卷05-期中期末考点大串讲(已下线)模块二 专题6《统计》单元检测篇 B提升卷 (苏教版)
6 . 武汉大学附属中学实验楼一侧有块扇形空地,如图,经测量其半径为
,圆心角为
.学校准备在此扇形空地上修建一处高一年级青少年科学院室外活动露天教室,现有两个设计方案面向全体高一年级学生征求意见:
方案一:按如下方式修建一平行四边形“创意型(
)”教室,其余空地绿化(如下左图):在弧
上任取一点
(异于
),过点
分别作
、
平行于
、
,交
、
分别于
、
两点;
方案二:按如下方式修建一矩形“传统型(
)”教室,其余空地绿化(如下左图):在弧
上任取一点
(异于
,
),过点
分别作
垂直于
,
平行于
,分别交
、
于
、
两点.经随机走访调查,对于这两种方案主要有二种反馈意见:
说法一:方案一教室形状有创意,感觉教室面积更大,所以方案一好;
说法二:方案二传统矩形教室感觉亲切,面积更大,所以方案二好;
说法三:只要点
(异于
,
)固定,按照这两个方案修建的教室面积完全一样,所以就教室面积大小而言,这两个方案没区别.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/e868dba3-a61a-4d7a-9790-3487d636e6f4.png?resizew=198)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/7b0c30c3-db1b-400d-aa2c-ffa709de90b1.png?resizew=191)
(1)亲爱的高一学子,根据所学,你认为说法三对吗?(只需作出判断,无需说明理由);
(2)请大家在这两个方案里面,选择一个你最喜欢的方案,并根据你选择的方案求出教室面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9f5c1c5015c71722cff00a02ad27a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
方案一:按如下方式修建一平行四边形“创意型(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033274547930b2e2dcd4ea4919a36738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
方案二:按如下方式修建一矩形“传统型(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9e7f4b57507c84003d2a9d6916c540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
说法一:方案一教室形状有创意,感觉教室面积更大,所以方案一好;
说法二:方案二传统矩形教室感觉亲切,面积更大,所以方案二好;
说法三:只要点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/e868dba3-a61a-4d7a-9790-3487d636e6f4.png?resizew=198)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/7b0c30c3-db1b-400d-aa2c-ffa709de90b1.png?resizew=191)
(1)亲爱的高一学子,根据所学,你认为说法三对吗?(只需作出判断,无需说明理由);
(2)请大家在这两个方案里面,选择一个你最喜欢的方案,并根据你选择的方案求出教室面积的最大值.
您最近一年使用:0次
解题方法
7 . 黄冈市一中学高一年级统计学生本学期
次数学周测成绩(满分
),抽取了甲乙两位同学的
次成绩记录如下:
![](https://img.xkw.com/dksih/QBM/2021/7/3/2756182890135552/2780130374492160/STEM/a07d827d-4ec5-42ef-9d59-ff2692a30f11.png?resizew=266)
甲:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634ada50a88e5b6571c9e6d0f3df5c4a.png)
乙:
(1)根据以上记录数据求甲乙两位同学成绩的中位数,并据此判断甲乙两位同学的成绩谁更好?
(2)将同学乙的成绩分成
,完成下列频率分布表,并画出频率分布直方图;
(3)现从甲乙两位同学的不低于
分的成绩中任意取出
个成绩,求取出的
个成绩不是同一个人的且没有满分的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7afc6e67a875ed2eb889e950a77715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://img.xkw.com/dksih/QBM/2021/7/3/2756182890135552/2780130374492160/STEM/a07d827d-4ec5-42ef-9d59-ff2692a30f11.png?resizew=266)
甲:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634ada50a88e5b6571c9e6d0f3df5c4a.png)
乙:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b96b2ebbed1660cb9b9cbc0c9874f8a.png)
(2)将同学乙的成绩分成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc4dca2f4e1ffe46507effc8a12561aa.png)
分组 | 频数 | 频率 |
![]() | ||
![]() | ||
![]() | ||
![]() | ||
![]() | ||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e85c53a287e873f35c9ca64972023c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
您最近一年使用:0次
名校
解题方法
8 . 某中学在2020年高考分数公布后对高三年级各班的成绩进行分析.经统计某班有
名同学,总分都在区间
内,将得分区间平均分成
组,统计频数、频率后,得到了如图所示的“频率分布”折线图.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/8cd25d06-3752-48d0-a024-d626aa5d831d.png?resizew=293)
(1)请根据频率分布折线图,画出频率分布直方图,并根据频率分布直方图估计该班级的平均分;
(2)经过相关部门的计算,本次高考总分大于等于
的同学可以获得高校
的“强基计划”入围资格.高校
的“强基计划”校考分为两轮.第一轮为笔试,所有入围同学都要参加,考试科目为数学和物理,每科的笔试成绩从高到低依次有
,
,
,
四个等级,两科中至少有一科得到
,且两科均不低于
,才能进入第二轮,第二轮得到“通过的同学将被高校
提前录取.已知入围的同学参加第一轮笔试时,总分高于
分的同学在每科笔试中取得
,
,
,
的概率分别为
,
,
,
;总分不超过
分的同学在每科笔试中取得
,
,
,
的概率分别为
,
,
,
;进入第二轮的同学,若两科笔试成绩均为
,则免面试,并被高校
提前录取;若两科笔试成绩只有一个
,则要参加面试,总分高于
分的同学面试“通过”的概率为
,总分不超过
分的同学面试“通过”的概率为
,面试“通过”的同学也将被高校
提前录取.若该班级考分前
名都已经报考了高校
的“强基计划”,且恰有
人成绩高于
分.求
①总分高于
分的某位同学没有进入第二轮的概率
;
②该班恰有两名同学通过“强基计划”被高校
提前录取的概率
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f565a78d5e08a43770a7d57244414d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/8cd25d06-3752-48d0-a024-d626aa5d831d.png?resizew=293)
(1)请根据频率分布折线图,画出频率分布直方图,并根据频率分布直方图估计该班级的平均分;
(2)经过相关部门的计算,本次高考总分大于等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee47c1ed75a5980f2840aa84d993fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea39d1b3cb808688585b5382a75391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7abf02717d6e59d8a64a65a87c412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7abf02717d6e59d8a64a65a87c412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea39d1b3cb808688585b5382a75391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea39d1b3cb808688585b5382a75391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea39d1b3cb808688585b5382a75391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea39d1b3cb808688585b5382a75391.png)
①总分高于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea39d1b3cb808688585b5382a75391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
②该班恰有两名同学通过“强基计划”被高校
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b857a23d7df0f7324bbdd4939bc831f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
您最近一年使用:0次
2021-06-03更新
|
941次组卷
|
4卷引用:湖北省十一校2022届高三下学期第二次联考数学试题
9 . 一种作图工具如图1所示.
是滑槽
的中点,短杆
可绕
转动,长杆
通过
处铰链与
连接,
上的栓子
可沿滑槽AB滑动,且
,
.当栓子
在滑槽AB内做往复运动时,带动
绕
转动一周(
不动时,
也不动),
处的笔尖画出的曲线记为
.以
为原点,
所在的直线为
轴建立如图2所示的平面直角坐标系.
(Ⅰ)求曲线C的方程;
(Ⅱ)设动直线
与两定直线
和
分别交于
两点.若直线
总与曲线
有且只有一个公共点,试探究:
的面积是否存在最小值?若存在,求出该最小值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/505c6b1bb0214914813bd468e5658abd.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/f33972f039914ebfa9d824c29b1ce058.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/56a73279e3984bf789d920f038332a76.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/01dab6f0505b44b09fe64e1833a4a4ff.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/505c6b1bb0214914813bd468e5658abd.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/56a73279e3984bf789d920f038332a76.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/9927897ec3b34f83b734e2812f0050eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17df11e4f242f1ab2c664127a9cc4274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e47bb98258ebfcf1d8ad4bac10b7ba.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/9927897ec3b34f83b734e2812f0050eb.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/01dab6f0505b44b09fe64e1833a4a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/9927897ec3b34f83b734e2812f0050eb.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/01dab6f0505b44b09fe64e1833a4a4ff.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/3198a5c7ac1b44c19224417bc21c6725.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/9d5e5b28b9fc41f89792b5e3dfb97d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/7c593eff-1103-4bce-9ba1-1a807ac5c37d.png?resizew=337)
(Ⅰ)求曲线C的方程;
(Ⅱ)设动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b65826e98ba9bea060a68b4a66a2555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41bd9a29a1bde0ab8d008769bfd279a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c42b4b5f59cf1e505febfb43f3f4647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572139040808960/1572139046526976/STEM/680e72e7474b455bbfe34e88500a3a49.png)
您最近一年使用:0次
2016-12-03更新
|
4651次组卷
|
15卷引用:2015年全国普通高等学校招生统一考试理科数学(湖北卷)
2015年全国普通高等学校招生统一考试理科数学(湖北卷)2015年全国普通高等学校招生统一考试文科数学(湖北卷)(已下线)上海市华东师范大学第二附属中学2017-2018学年高三上学期10月月考数学试题北京市北京一零一中学2019-2020学年高二第一学期期末考试数学试题北京市101中学2019-2020学年上学期高二年级期末考试数学试题(已下线)专题29 圆锥曲线的综合问题-十年(2011-2020)高考真题数学分项安徽省马鞍山市第二中学2020-2021学年高二上学期期末理科数学试题(已下线)专题22 圆锥曲线的“三定”与探索性问题(讲)-2021年高三数学二轮复习讲练测(新高考版)(已下线) 专题26 圆锥曲线的“三定”与探索性问题(讲)-2021年高三数学二轮复习讲练测(文理通用)(已下线)专题23 圆锥曲线中的最值、范围问题 微点1 圆锥曲线中的最值问题贵州省遵义市南白中学2022-2023学年高二下学期第一次联考数学试题(已下线)专题24 解析几何解答题(文科)-4(已下线)专题24 解析几何解答题(理科)-3专题36平面解析几何解答题(第一部分)专题37平面解析几何解答题(第一部分)