1 . 如图,抛物线
与
轴交于
两点,与
轴交于点
,点
为抛物线顶点,已知
,连接
,抛物线对称轴与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/7288fac8-aef9-4aa7-a8e9-33cb8e0d378e.png?resizew=333)
(1)求
的值及顶点
的坐标;
(2)点
是抛物线上的动点,点
是直线
上的动点,是否存在以
为边,且以点
为顶点的四边形是平行四边形?若存在,请求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974cf6ed500e27d2a9928db300645f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/7288fac8-aef9-4aa7-a8e9-33cb8e0d378e.png?resizew=333)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e8c1ef22db302fea2aa5771fa018cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2 . 如图在平面直角坐标系中放置一直角三角板,其顶点为
,
,
,将此三角板绕原点O顺时针旋转
,得
.
(1)某抛物线经过点
,B,
,求该抛物线的表达式;
(2)点M为第一象限内的抛物线上的一动点,是否存在一点M,使得四边形
是平行四边形?若存在,请求出M的坐标,若不存在,说明理由.
(3)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b0431bc1d2c8c584ae47ae462f87c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523497c950610ac0655661c151422777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/47ef643b-7661-4960-94f8-d24eaaa99f33.png?resizew=205)
(1)某抛物线经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(2)点M为第一象限内的抛物线上的一动点,是否存在一点M,使得四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db57b65154860a14a4df845ba9cc613.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19343455668abab3ca3b05aa2cf616c2.png)
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3 . 如图,在直角坐标系中有一
,O为坐标原点,
,
,将此三角形绕原点O逆时针旋转
,得到
,抛物线
经过点A,B,C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/1c44cfe7-92ed-4ff4-b425-01c4d0e956cc.png?resizew=156)
(1)求抛物线的解析式;
(2)若点P是第二象限内抛物线上的动点,其横坐标为t,是否存在一点P,使
的面积最大?若存在,求出
面积的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1aa5409af51402934ced98f0d1fe30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96bcaab1157f577919c7abc73a66ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/1c44cfe7-92ed-4ff4-b425-01c4d0e956cc.png?resizew=156)
(1)求抛物线的解析式;
(2)若点P是第二象限内抛物线上的动点,其横坐标为t,是否存在一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
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4 . 如图,已知抛物线
与直线
交于点
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/4becc74a-5273-4e36-aad9-ce29f4d4e90b.png?resizew=139)
(1)求此抛物线的解析式;
(2)设点P是直线
下方抛物线上的一动点,当
面积最大时,求点P的坐标,并求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc229acc8bf1a2047394bda863b1ea71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235d7dd12f948f5ffb2e5afddc95612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1394a4ed26d099cb02fb97ccb635f0f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/4becc74a-5273-4e36-aad9-ce29f4d4e90b.png?resizew=139)
(1)求此抛物线的解析式;
(2)设点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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5 . 如图,在平面直角坐标系中,直线
与
轴交于点
,与
轴交于点
,二次函数
的图象经过
两点,且与
轴的负半轴交于点
,动点
在直线
下方的二次函数图象上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/6ba7bc1f-64c0-44c6-ab7e-b13276c2ac18.png?resizew=174)
(1)求二次函数的表达式;
(2)连接
,设
的面积为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026808536f6b6d265c778e23836fbf13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/6ba7bc1f-64c0-44c6-ab7e-b13276c2ac18.png?resizew=174)
(1)求二次函数的表达式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baeea1e4b495eac58570e5bc3e9ab4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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23-24九年级上·山东·期末
6 . 如图所示,抛物线与x轴交于A、B两点,与y轴交于点
,且
,
.
(2)若连接
、
.动点D从点A出发,在线段
上以每秒1个单位长度向点B做匀速运动;同时,动点E从点B出发,在线段
上以每秒
个单位长度向点C做匀速运动,当其中一点到达终点时,另一点随之停止运动,连接
,设运动时间为t秒.在D、E运动的过程中,当t为何值时,四边形
的面积最小,最小值为多少?
(3)点M是抛物线上位于x轴上方的一点,点N在x轴上,是否存在以点M为直角顶点的等腰直角三角形
?若存在,求出点M的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e43a0013492c1fc023885fb9a5b68a27.png)
(2)若连接
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e65831c1e6103af4c0bb4a4a61b964.png)
(3)点M是抛物线上位于x轴上方的一点,点N在x轴上,是否存在以点M为直角顶点的等腰直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
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名校
7 . 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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8 . 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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9 . 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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10 . 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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