如图,在平面直角坐标系中,点
是抛物线
的图象的顶点,点
,
的坐标分别为
,
,将
沿
轴向下平移使点
平移到点
,再绕点
逆时针旋转
,若此时点
,
的对应点
,
恰好落在抛物线上,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2022/4/1/2953891630596096/2982087888330752/STEM/426222f2-bfd6-41e9-981d-b8960afae6a6.png?resizew=203)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699b6c7253fbfb1202ec6abb90b91d8d.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/fb0e705301752424a492f6277ed7774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/c02b54dc6b3e1bb6544f47d4c8743fcf.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/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2953891630596096/2982087888330752/STEM/426222f2-bfd6-41e9-981d-b8960afae6a6.png?resizew=203)
A.![]() | B.-1 | C.![]() | D.-2 |
2022·浙江温州·一模 查看更多[4]
2022年浙江省温州市乐清市初中毕业升学考试适应性测试(一模)数学试题(已下线)专题22.37 《二次函数》全章复习与巩固(巩固篇)(专项练习)-2022-2023学年九年级数学上册基础知识专项讲练(人教版)(已下线)专题2.43 二次函数(全章复习与巩固)(巩固篇)(专项练习)-2022-2023学年九年级数学下册基础知识专项讲练(北师大版)(已下线)专题5.43 《二次函数》全章复习与巩固(巩固篇)(专项练习)-2022-2023学年九年级数学下册基础知识专项讲练(苏科版)
更新时间:2022-05-18 15:36:15
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【推荐1】图是抛物线
的部分图象,其顶点为M,与y轴交于点(0,3),与x轴的一个交点为A,连接MO,MA.以下结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/25/21447e96-5aa5-4e43-b0ea-be0538620590.png?resizew=158)
①常数
;
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③
;
④当
时,
.
其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b7b0692284935a8bb2a76a1f7bbe91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/25/21447e96-5aa5-4e43-b0ea-be0538620590.png?resizew=158)
①常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b8ef7561858f8b80cfc8a7b3ba3c02.png)
②抛物线经过点(-2,3);
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddc877ee6aa751e01e237b1a1473d9a.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd357d2e5742c334dcfe95fb5d8faa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
其中正确的是( )
A.①③ | B.②③ | C.②④ | D.①④ |
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【推荐2】二次函数的
与
的部分对应值如表,则下列判断中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | … | 0 | 1 | 3 | 4 | … |
![]() | … | 2 | 4 | 2 | -2 | … |
A.抛物线开口向上 | B.![]() |
C.当![]() ![]() ![]() | D.当![]() ![]() |
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【推荐1】如图,将正方形ABCD绕点A顺时针旋转35°,得到正方形AEFG,DB的延长线交EF于点H,则∠DHE的大小为 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/7984739b-47c9-4acf-8d1f-32162450b14c.png?resizew=180)
A.90° | B.95° |
C.100° | D.105° |
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【推荐2】如图,等边三角形ABC的边长是2,M是高CH所在直线上的一个动点,连接MB,将线段BM绕点B逆时针旋转60°得到BN,连接MN,则在点M运动过程中,线段MN长度的最小值是( )
![](https://img.xkw.com/dksih/QBM/2021/9/11/2806017112809472/2806695050649600/STEM/b55def51-3da7-49f2-857d-913b8d4318c5.png)
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A.![]() | B.1 | C.![]() | D.![]() |
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【推荐1】如图,将置于平面直角坐标系中的三角板AOB绕O点顺时针旋转90°得△A'OB'.已知∠AOB=30°,∠B=90°,AB=1,则B'点的坐标为 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/79dadd7c-13d5-484d-8b8f-7f9e4a5894b9.png?resizew=149)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/79dadd7c-13d5-484d-8b8f-7f9e4a5894b9.png?resizew=149)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】正方形ABCD在坐标系中的位置如图所示,将正方形ABCD绕D点顺时针旋转90°后,B点的坐标为( )
![](https://img.xkw.com/dksih/QBM/2014/1/14/1573698511822848/1573698517385216/STEM/c466acee029b4c05a0928524204a0ed2.png)
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【推荐1】如图,抛物线
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![](https://img.xkw.com/dksih/QBM/2020/1/30/2388309088485376/2389585198268416/STEM/247fa5560ff741e3a59b33342a668edc.png?resizew=214)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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您最近一年使用:0次
单选题
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【推荐2】如图是抛物线
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轴交于点
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轴的一个交点为
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.以下结论:①
;②抛物线经过点
;③
;④当
时,
.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/2/1/2389740099747840/2390588588285952/STEM/34ba44da-89ba-469c-b70f-6c214c15cfae.png?resizew=175)
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