如图,已知二次函数
的图象经过点
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/cb19afe2-0359-4819-8db4-a98babef1cc3.png?resizew=192)
(1)求该二次函数表达式;
(2)直接写出直线
的解析式;
(3)P为第一象限内该二次函数图象上一动点,过P作
,交直线
于点Q,作
轴交
于M.求线段
的最大值及此时点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9b5fb091b11c1ab96d5a8ea639b428.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/cb19afe2-0359-4819-8db4-a98babef1cc3.png?resizew=192)
(1)求该二次函数表达式;
(2)直接写出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)P为第一象限内该二次函数图象上一动点,过P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9a8ae6c15072d8ae52b43c8edd9cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
22-23九年级上·浙江宁波·期中 查看更多[2]
浙江省宁波前湾新区科学初级中学2022-2023学年九年级上学期期中数学试题(已下线)专题06 二次函数中的线段及周长问题-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(北师大版)
更新时间:2022-11-15 17:08:02
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【推荐2】如图,函数y1=
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【推荐2】如图,抛物线顶点坐标为
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【推荐1】如图,反比例函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
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【推荐1】如图抛物线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90c25414cc614fe3f28c01ecbe0f980.png)
(3)当m取何值时,w取得最大值,并求出此时点M,G的坐标.
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