1 . 已知,在平面直角坐标系中,抛物线
经过
,
,
三点.
(1)求抛物线对应的函数表达式;
(2)求抛物线的对称轴和顶点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f2638d71e5d00c241c6704b32094d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5835ba4e6ab3a8591ac32ea548724ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76751b6d083ec3f5f08308dfedadf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48772e708a1baed9766db83d5d4edeb5.png)
(1)求抛物线对应的函数表达式;
(2)求抛物线的对称轴和顶点坐标.
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2024-01-11更新
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2卷引用:山东省临沂市费县第二中学2023-2024学年九年级上学期1月月考数学试题
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2 . 已知:抛物线
与x轴相交于
两点,与y轴相交于点C,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/93574cf3-ac19-4b3a-80bb-b757915ca69c.png?resizew=379)
(1)求抛物线的表达式并直接写出点C的坐标;
(2)如图,点M是抛物线第一象限内的一点,连接
,求
面积的最大值;
(3)点P也是抛物线第一象限内的一点,过点P作
于N,连接
,当以P、C、N为顶点的三角形与
相似时,直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cca107b48f2270ed8ac92b2e0885a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/93574cf3-ac19-4b3a-80bb-b757915ca69c.png?resizew=379)
(1)求抛物线的表达式并直接写出点C的坐标;
(2)如图,点M是抛物线第一象限内的一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45432507c464b84094430f5c905a23ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
(3)点P也是抛物线第一象限内的一点,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a6922808e9b59352c25c341cf23851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
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3 . 已知抛物线
.且图像过点
.
(1)求解析式及顶点坐标;
(2)当
时,直接写出y的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a2046c5a935f2d4ad58d3e85260bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
(1)求解析式及顶点坐标;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e546d27d099d383c2abff1f46139824.png)
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4 . 已知抛物线
的图象经过点
和点
.求此二次函数的解析式;(用二次函数一般式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba23d524dc2a51f2a2f5a2eec842f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d429efe96d68065e7d433c996682791d.png)
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5 . 抛物线
图像经过点
,则函数的解析式为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64776ea38ff918d9330a27d780f809cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881fe2df23c5a0fe1d1fecbe9ffa55fb.png)
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6 . 如图,抛物线
与x轴交于A、B两点,与y轴交于点C,直线
过B、C两点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/74af511b-d142-4ce5-a150-d6b0e12ed5b9.png?resizew=200)
(1)求抛物线的解析式;
(2)求证:
;
(3)抛物线对称轴上是否存在点P使得
的最小值,若存在,求出点P坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9118cc77fc0a045337745890e50cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/74af511b-d142-4ce5-a150-d6b0e12ed5b9.png?resizew=200)
(1)求抛物线的解析式;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767bcca107034191460cd6fe3f17e7bf.png)
(3)抛物线对称轴上是否存在点P使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1441093334b71f88954eed46804c316c.png)
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7 . 如图,已知抛物线
与x轴交于A、B两点,过点A的直线l与抛物线交于点C, 其中A点的坐标是
, C点坐标是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/f8d2c227-7df6-4228-a596-64883db9b113.png?resizew=122)
(1)求抛物线的解析式;
(2)求出点B的坐标以及
的面积;
(3)若点P为抛物线对称轴上的一个动点,当
周长最小时求出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32d26c8d44f5fb4813a19c1030a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8b77523fdb650961e4cc870e12180d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/f8d2c227-7df6-4228-a596-64883db9b113.png?resizew=122)
(1)求抛物线的解析式;
(2)求出点B的坐标以及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)若点P为抛物线对称轴上的一个动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
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8 . 如图,抛物线
与
轴交于
两点(点
位于点
的右边),与
轴交于点
,连接
是抛物线上的一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/b730e459-fb9e-4804-a422-e440380fa9ae.png?resizew=393)
(1)求抛物线对应的函数表达式以及
两点的坐标.
(2)若点
位于第四象限,过点
作
,求
的最大值.
(3)点
在抛物线的对称轴上,且
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a52e840316fb1ca5cd99cf6f32eb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e1d2e6e715231fb70b4c41c65144e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/b730e459-fb9e-4804-a422-e440380fa9ae.png?resizew=393)
(1)求抛物线对应的函数表达式以及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85517a94764454dfa53e6b754d643d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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2024-01-02更新
|
360次组卷
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2卷引用:山东省日照市五莲县第二中学2023-2024学年九年级上学期第二次抽测数学试题
9 . 已知:抛物线
经过
,
,
三点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/e2f403e4-7970-4474-8d4f-3fac1145c270.png?resizew=468)
(1)求抛物线的解析式;
(2)如图1,
是x轴正半轴上一点,过点D作y轴的平行线,与直线
交于点M,与抛物线交于点N,在图1中探究:是否存在点D,使
?若存在,请求出D的坐标;若不存在,请说明理由;
(3)如图2,点P为直线
上方抛物线上任意一点,连接
、
、
,
交直线
于点E,设
,求当k取最大值时点P的坐标,并求出此时k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e01debd266a398b597a1876dbb3ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/e2f403e4-7970-4474-8d4f-3fac1145c270.png?resizew=468)
(1)求抛物线的解析式;
(2)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24acb5f8778697f06675690936bc387c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25be6617d61a7cb5a88b0d680b252b10.png)
(3)如图2,点P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d86e8928530a34ff3721b998ad5e058.png)
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10 . 综合与探究:
如图,抛物线
与x轴交于点
和点
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/05013752-4055-4d48-b25f-a4e8b38f5dc9.png?resizew=375)
(1)求此抛物线的函数表达式;
(2)若点D是第三象限抛物线上一动点,连接
,求
面积的最大值,并求出此时点D的坐标;
(3)若点E是抛物线上一点,若
是以
为底的等腰三角形,请直接写出点E的坐标.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78531ca6d555e824f53ebae6adb666a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4e3a3a7384f89428febdd4f0d97162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021a243fa77574240318ff3fc00cd650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/05013752-4055-4d48-b25f-a4e8b38f5dc9.png?resizew=375)
(1)求此抛物线的函数表达式;
(2)若点D是第三象限抛物线上一动点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af831ab4b136505ac37d71e97c542753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)若点E是抛物线上一点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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2023-12-31更新
|
152次组卷
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2卷引用:山东省济南市长清区长清区第三初级中学2023-2024学年九年级上学期12月月考数学试题