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1 . 一件工艺品的进价为
元,标价
元出售,每天可售出
件,根据销售统计,一件工艺品每降价
元,则每天可多售出
件,要使每天获得的利润最大,则每件需降价( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/facf8615bd031fdac2b764010ffa1440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 不论
取任何实数,抛物线
的顶点都( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd801a51536a456f317cb72613a00b8.png)
A.在![]() | B.在直线![]() |
C.在![]() | D.在![]() |
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3 . 如图,在平面直角坐标系中,二次函数
的图象与坐标轴交于
,
,
三点,其中点
的坐标为
,点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/e5c162e4-1c29-4ff0-8d01-1f367a953538.png?resizew=143)
(1)求该二次函数的表达式及点
的坐标.
(2)若点
的坐标是
,
为该二次函数在第四象限内图象上的动点,连接
,
,以
,
为邻边作平行四边形
,设平行四边形
的面积为
.
①求
的最大值;
②在点
的运动过程中,当点
落在该二次函数的图象上时,请求出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d365ca2de4040db88d7283b7fcff2f3a.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbff8a36fff30a0046929967b617fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7860ed059932e1bc290b64d85d1a08cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/e5c162e4-1c29-4ff0-8d01-1f367a953538.png?resizew=143)
(1)求该二次函数的表达式及点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59006315422df4fc4c3c183149ecc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
②在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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4 . 如图,山顶上有一个信号塔
,已知信号塔
高15米,在山脚下点
处测得塔底
的仰角
,塔顶
的仰角
,求山高
(点
,
,
在同一条竖直线上).(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/be6a0e4cdfc2cd35579ce13698344fcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ed4376bd80671afdb7fe1cfc782c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b2e80c2564845278a3b2c2d3180ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ddacb7cf5550632fb60d3ec4170567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23630a2979b63f88a4805d106ede3bd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/4664f98a-5a3f-406a-a38c-f85168c48679.png?resizew=204)
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5 . 某学校开展了防疫知识的宣传教育活动,为了了解这次活动的效果,学校从全校1500名学生中随机抽取部分学生进行知识测试(测试满分100分,得分
均为不小于60的整数),并将测试成绩分为四个等级:基本合格
,合格
,良好
,优秀
,制作了如图所示的统计图(部分信息未给出).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/ef04b1fa-28ed-4577-b6b8-169b8cc6fe3d.png?resizew=501)
由图中给出的信息解答下列问题:
(1)求测试成绩为合格的学生人数,并补全频数分布直方图.
(2)求扇形统计图中“良好”所对应的扇形圆心角的度数.
(3)这次测试成绩的中位数是什么等级?
(4)如果全校学生都参加测试,请你根据抽样测试的结果,估计该校获得优秀的学生有多少人?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e37124462fede1ad8131bd6ed9adc3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbacf55cd9a7f9d586991140b7c2888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d026a2288f40e97693660f828caea3ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90ff4b521e60337eaa8bbb51d58a231.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/ef04b1fa-28ed-4577-b6b8-169b8cc6fe3d.png?resizew=501)
由图中给出的信息解答下列问题:
(1)求测试成绩为合格的学生人数,并补全频数分布直方图.
(2)求扇形统计图中“良好”所对应的扇形圆心角的度数.
(3)这次测试成绩的中位数是什么等级?
(4)如果全校学生都参加测试,请你根据抽样测试的结果,估计该校获得优秀的学生有多少人?
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2022-08-31更新
|
53次组卷
|
2卷引用:甘肃省武威市民勤县第一中学2022-2023学年高一上学期开学考试数学试题
6 . 如图,直线
与
轴的夹角为30°,
.
,
,
…,
均为等边三角形,点
,
,
,…,
依次在
轴上,点
,
,
,…,
,依次在直线
上,则
的面积小于3000时,
的最大值为___________ .![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bfdb53117463d600b565c30e0f3e36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee5747ae1c372be1170242c4aecee5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f90f523a36e54c3bd90fc4cdb79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722cce35fc3eaebf762e91b5811145c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f36e21d075bcc10bd78880989487400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c63767077a3831d8bbee872a7fe7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039af66355ed85ff4c204931b882b694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2857fac4963b129d99e79dcb3e13d295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62288daadd869322edab19535a4ffab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c63767077a3831d8bbee872a7fe7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bfdb53117463d600b565c30e0f3e36.png)
![](https://img.xkw.com/dksih/QBM/2022/8/27/3053788033212416/3056141334511616/STEM/4788089ffe824afeb716771654b87958.png?resizew=297)
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2卷引用:甘肃省武威市民勤县第一中学2022-2023学年高一上学期开学考试数学试题
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7 . 有关于二次函数
的三个结论如下:
①对任意的实数
,都有
与
对应的函数值相等;
②若
,对应的
的整数值有4个,则
或
;
③若抛物线与
轴交于不同的两点
,
,且
,则
或
.
其中正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee350234b149f3763ac8e9f7f64825c3.png)
①对任意的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9620730c2cf6ffc9c65d76d8e1bda68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc648c743c9f7f2b2c49e8987507211.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20d1be3f52520e09f4a76b53b3d4481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5256d45a4c07189fe4c8ca378cfa4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c532ffbbc4bc33543a66aff306d516e0.png)
③若抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/727b86a5e32149d29b9404644a348903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35253eb1d8e694f7ed64af83c51c2bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
其中正确结论的序号是( )
A.①② | B.①③ | C.②③ | D.①②③ |
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解题方法
8 . 春运期间,小明和小华两位同学报名参加了去本地客运站疏导乘客的公益活动,若两人分别被随机分配到
、
、
三个客运站中的一个,则两人被分在同一个客运站的概率为( )
![](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)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-08-05更新
|
825次组卷
|
3卷引用:甘肃省张掖市某重点校2022-2023学年高二上学期开学检测数学试题
2022高一·全国·专题练习
名校
9 . 定义:由a,b构造的二次函数
叫做一次函数y=ax+b的“滋生函数”,一次函数y=ax+b叫做二次函数
的“本源函数”(a,b为常数,且
).若一次函数y=ax+b的“滋生函数”是
,那么二次函数
的“本源函数”是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72ab6eab03928ffd22510fdeb8f79c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72ab6eab03928ffd22510fdeb8f79c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72619e5e25bf0385042123fdda96e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72619e5e25bf0385042123fdda96e6.png)
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