名校
解题方法
1 . 将100个数据整理并绘制成频率分布直方图(如图所示),则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/7048e0c2-241b-446c-b974-ea083c1e3dc4.png?resizew=233)
A.![]() |
B.该组数据的平均数的估计值大于众数的估计值 |
C.该组数据的第90百分位数约为109.2 |
D.在该组数据中随机选取一个数据记为n,已知![]() ![]() ![]() |
您最近一年使用:0次
2023-10-09更新
|
519次组卷
|
3卷引用:福建省漳州市2024届高三毕业班第一次教学质量检测数学试题
2 . 已知复数
,
,
,
为坐标原点,
,
,
对应的向量分别为
,
,
,则以下结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f350fee2117b2a0c7716eec5610491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4bed51d4197e5b08130ccc354b0139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9162109b1517e42385047ccbec230ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a67a742d2a43e907fb1c3a1bdf1d6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30deb1f343048675b9b231620369668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1640d3fff861f45c5eb4019943b000f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c5b242337b24f77cc9caf8408f1e58.png)
A.![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2023-09-19更新
|
510次组卷
|
5卷引用:福建省莆田第一中学2023-2024学年高二上学期开学考数学试题
福建省莆田第一中学2023-2024学年高二上学期开学考数学试题河南省焦作市博爱县第一中学2023-2024学年高三上学期期中数学试题河北省衡水市武邑中学2024届高三上学期期中数学试题(已下线)专题7.8 复数全章综合测试卷(提高篇)-举一反三系列(已下线)12.4 复数的三角形式-【帮课堂】(苏教版2019必修第二册)
3 . 抛物线
交
轴于
,
两点,与
轴交于点
,连接
,
.
为线段
上的一个动点,过点
作
轴,交抛物线于点
,交
于点
.
(1)求抛物线的表达式;
(2)设
点的坐标为
,请用含
的代数式表示线段
的长,并求出当
为何值时,
有最大值,最大值是多少?
(3)试探究点
在运动过程中,是否存在这样的点
,使得以
为顶点的三角形是等腰三角形,若存在,请直接写出此时点
的坐标;若不存在,请说明理由.
(4)在(2)的条件下,直线
上有一动点
,连接
,将线段
绕点
逆时针旋转
度,使点
的对应点
恰好落在该抛物线上,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90731f6d4190300b33385ce70eb2783a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/5ba93605-d185-4d25-97f1-868993619271.png?resizew=168)
(1)求抛物线的表达式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)试探究点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557efcd952a41e4a2ed82928445429cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(4)在(2)的条件下,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17161b28b6ad8f57abc5b11e1b6c671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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4 . 在一次数学活动课上,老师要求同学们画15°、30°和60°角,小强同学身旁没有量角器,也没有圆规、三角尺,他灵机一动,想到了折纸的办法:他拿出一张矩形纸片
,先对折使
与
重合,如图一,得到折痕
,把纸片展平,再一次折叠纸片
,使点
落在
上的
处,并使折痕经过点
,得到折痕
和线段
.
(1)请直接写出
的度数,并说明理由;
(2)在图一的线段
上取一点
,将
沿着直线
折叠,如图二,使得
点恰好落在线段
上,求
;
(3)若
为
边上一点,如图三,将
沿直线
折叠,
的对应点为
,延长
交
边于点
,延长
交
边于点
,连接
.
①若
,当
时,若存在唯一的点
,使得四边形
为平行四边形,求
的值;
②在①的条件下,若
为线段
上一动点,如图四,连接
,取线段
的中点
,连接
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/dc966f24-8ff2-417d-8670-e6f8bdae0cfc.png?resizew=175)
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76e136e7df3692ae6536fc70b6961a9.png)
(2)在图一的线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1028cdd34b2ec5e663dd1f8092a32a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad8115387158c8dda205d26968ba11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28df0b35b6afe90dcba33b09a4b9b13f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/8ec36c3e-4d2b-4248-adbb-853570f3befb.png?resizew=172)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/b3f6d92f-b8d9-4863-b6f5-1fb877d0ef77.png?resizew=160)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f6197e055a0bc8a2a0c1414026e6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc3dcc4325297dac77a92c0682a6cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8412a577b2368392d634250d43c57f3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②在①的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/20dac818-63b8-481e-8185-afa70ca936de.png?resizew=160)
您最近一年使用:0次
2023-09-07更新
|
28次组卷
|
2卷引用:福建省宁德市第五中学2023-2024学年高一上学期学生学科素养测试数学试题
名校
5 . 如图,在平行四边形
中,
是
的中点,则下列四个结论:
①
;
②若
,
,则
;
③若
,则
;
④若
,则
与
全等.
其中正确的结论为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/4db5b0f4-68d3-459f-a868-ccf3c61118ee.png?resizew=179)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ba02a6816033ade98e679a59a3b24.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3796f1648a3d17b0e9ff860300a5ead6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d1d3c51f36c9913364a8fc8c643530.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594b800b89955d8d2e605cc7977bb75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2f1e7b232aa818163ce24a549ce1f.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b317b54f6072b74b42e27a534eddf28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a5c35b41bb1a8fa59998a6dcc791f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a37ba261860ddad9d11b2e8348a8f3.png)
其中正确的结论为( )
A.① | B.② | C.③ | D.④ |
您最近一年使用:0次
2023-09-07更新
|
24次组卷
|
2卷引用:福建省宁德市第五中学2023-2024学年高一上学期学生学科素养测试数学试题
名校
6 . 如图,将边长为2cm的正方形
沿其对角线
剪开,再把
沿着
方向平移,得到
,若两个三角形重叠部分的面积为
,则它移动的距离
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168487ff53e9fb74f786a7e6e78823e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/c854bb17-958d-424f-bb32-21c4e3aec8b2.png?resizew=258)
A.0.5cm | B.1cm | C.1.5cm | D.2cm |
您最近一年使用:0次
2023-09-07更新
|
26次组卷
|
3卷引用:福建省宁德市第五中学2023-2024学年高一上学期学生学科素养测试数学试题
7 . 截至2021年末,福建省南平市辖2个市辖区、3个县级市、5个县,南平市总面积为2.63万平方公里,其中的5个县为顺昌县、浦城县、光泽县、松溪县、政和县,它们的面积(单位:平方公里)分别为1991.95,3374.73,2232.17,1040.25,1735.01,则这5个县的面积的
分位数为________ 平方公里.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d960769a0d7509930ca19e8aeeb36814.png)
您最近一年使用:0次
8 . 已知甲、乙、丙、丁四组(每组均含100个数据)数据的方差分别为6.7,8.9,3.6,5.5,关于这四组数据的波动性,下列判断正确的是( )
A.乙组数据的波动性最大 | B.丙组数据的波动性最大 |
C.乙组数据的波动性最小 | D.丙组数据的波动性最小 |
您最近一年使用:0次
2023-09-07更新
|
147次组卷
|
2卷引用:福建省部分名校2023-2024学年高二上学期入学联考数学试题
9 . 国际上常采用身体质量指数(
,缩写
)来衡量人体肥瘦程度,其计算公式是
.为了解某公司员工的身体肥瘦情况,研究人员从该公司员工体检数据中,采用比例分配的分层随机抽样方法抽取了50名男员工、30名女员工的身高和体重数据.计算得到他们的
值,并根据“中国成人的
数值标准”简称“指标”整理得到如下结果:
(1)若该公司男员工有1500名,则该公司共有多少名员工?
(2)以频率估计概率,分别从该公司男、女员工中各随机抽取2名员工,求抽到的员工中至少有一名是肥胖的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b258b9d716c02dbafd09017c61757d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c851d5b6da1f56e74a5aea5cc8fdeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db26c5c9025b51d0167879debacc61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c851d5b6da1f56e74a5aea5cc8fdeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c851d5b6da1f56e74a5aea5cc8fdeb.png)
指标 人数 性别 | 偏瘦(![]() | 正常(![]() | 偏胖(![]() | 肥胖(![]() |
男 | 12 | 17 | 11 | 10 |
女 | 9 | 11 | 7 | 3 |
(2)以频率估计概率,分别从该公司男、女员工中各随机抽取2名员工,求抽到的员工中至少有一名是肥胖的概率.
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10 . 某市抽查一周空气质量指数变化情况,得到一组数据:80,76,73,82,86,75,81.以下关于这组数据判断正确的有( )
A.极差为13 | B.中位数为82 | C.平均数为79 | D.方差为124 |
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2023-08-30更新
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274次组卷
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2卷引用:福建省福州市2024届高三上学期第一次质量检测数学试题