在平面直角坐标系
中,已知抛物线
与
轴交于点
,
.
(1)求抛物线的表达式.
(2)若抛物线
,当
时,
有最大值
,求
的值.
(3)若将抛物线
平移得到新抛物线
,当
时,新抛物线与直线
有且只有一个公共点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da50ebd2656745259525c8b157e389e6.png)
(1)求抛物线的表达式.
(2)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7039fe406bedce754fa58cc1f189a3bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbda0ee3688c681257a578e3ec5a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb09e832f67141d32e8f5611cdeb9fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b13d3854ea2671a9ae5be5b69a573e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
2024·浙江宁波·一模 查看更多[3]
2024年浙江省宁波市鄞州区咸祥、横溪、东吴等七校联考九年级中考模拟测试数学模拟试题(已下线)易错压轴01+二次函数1(十大易错压轴题型+举一反三+易错题通关)-备战2024年中考数学考试易错题(全国通用)2024年吉林省吉林油田第十二中学九年级第三次中考模拟考试数学试题
更新时间:2024-04-17 11:07:28
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相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知抛物线
过点
,
,点M、N为抛物线上的动点,过点M作
轴,交直线
于点D,交x轴于点E.过点N作
轴,垂足为点F
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/13279e7f-6c52-49c1-a9bd-1154aea621e2.png?resizew=184)
(1)求二次函数
的表达式;
(2)若M点是抛物线上对称轴右侧的点,且四边形
为正方形,求该正方形的面积;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ea62c52e397a7297631645bd941597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7480deb6fedddf1fb05d8cdb24be1703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec6c6b493d363aaf3080710b5cacf33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a270c5782f03a336385194e2f7965c5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/13279e7f-6c52-49c1-a9bd-1154aea621e2.png?resizew=184)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
(2)若M点是抛物线上对称轴右侧的点,且四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8e1c05117a74de20bcc5d825b1c29d.png)
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【推荐2】如图
,在平面直角坐标系中,
为坐标原点,已知抛物线
的顶点
的坐标为
与
轴交点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/f529d1a5-f6c9-4549-98fb-4df11bf9c976.png?resizew=363)
(1)求抛物线的解析式;
(2)如图
,点
为抛物线对称轴右侧抛物线上一点,连接
,
,
,若设
的面积为
,点
的横坐标为
,求
与
的函数关系式(不要求写出自变量
的取值范围);
(3)在(2)的条件下,如图
,对称轴
交
于点
,
轴交
延长线于点
,垂足为
,连接
交
轴于点
,在
的延长线上取点
,连接
使
,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047287bd0edb86476470650b7cd41263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/f529d1a5-f6c9-4549-98fb-4df11bf9c976.png?resizew=363)
(1)求抛物线的解析式;
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在(2)的条件下,如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2634263d383b0487281fdcf6fe3cc625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0db28ad4b7e8a22ef6fc1d4ab714c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0affe385c4d5eebce4256211090c610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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(0.4)
名校
【推荐1】如图,在平面直角坐标系中,抛物线
分别交
轴,
轴于点A,
和点
,抛物线
与抛物线
关于直线
对称,两条抛物线的交点为
,
(点
在点
的左侧).
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920492735922176/3062252979814400/STEM/1b68e2b273eb4892927ebd8aab70d76f.png?resizew=509)
(1)求抛物线
的表达式;
(2)将抛物线
沿
轴正方向平移,使点
与点
重合,求平移的距离;
(3)在(2)的条件下:规定抛物线
和抛物线
在直线
下方的图象所组成的图象为
,点
,
和
,
在函数
上(点
在点
的右侧),在(2)的条件下,若
,且
,求点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453c918969dadb6e6c9d0f4be4c8a393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a5ff72ba4e9d01ecf0c0fe07a48058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920492735922176/3062252979814400/STEM/1b68e2b273eb4892927ebd8aab70d76f.png?resizew=509)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)在(2)的条件下:规定抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033ccd1ebf578e1727d7907379fa828a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a350eb41c3b7e4face9c3299eff9d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e3c5d2e75308c341c6ddda9402eb64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24529eadaef974ec0625f8ca40682e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](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/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aeab36f3c3546b641470aad464ebd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
【推荐2】已知抛物线
的函数解析式为
,若抛物线
经过点
,对称轴为直线
.
(1)求抛物线
的解析式.
(2)已知实数
,请证明:
,并说明
为何值时才会有
.
(3)若抛物线
先向上平移4个单位,再向左平移1个单位后得到抛物线
,设
,
是
上的两个不同点,且满足:
,
,
.请你用含有
的表达式表示出
的面积
,并求出
的最小值及
取最小值时一次函数
的函数解析式.
(参考公式:在平面直角坐标系中,若
,则
两点间的距离
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3932d1d2c7c4b81ae923fcf5d3f74e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd685943cf39f7945b31e42d6221788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)已知实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63af71b9e6f71cd26e6e97541154cd8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73667345f1a09dec2b8f49cfd24566d.png)
(3)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a03997a177c943d84bfbe13a16eb6e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e452b96dc36b30641488388e77851e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3838d126e7480e3e0827999f3cf9f771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(参考公式:在平面直角坐标系中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df53be6623e4701d20d8350844c1f666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd8cb171425253834dfd7fa1a9da9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d987b5845938d153d6f31a4bb8cef499.png)
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名校
【推荐1】函数y=
(m为常数).
(1)若点(﹣2,1)在函数y上,求m的值.
(2)当点(m,﹣2)在函数y上时,求m的值.
(3)若m=1,当﹣2≤x≤2时,求函数值y的取值范围.
(4)已知正方形ABCD的中心为原点O,点A的坐标为(1,1),当函数y与正方形ABCD有3个交点时,直接写出实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9506c055aac0794f6089c7d1e4f07c.png)
(1)若点(﹣2,1)在函数y上,求m的值.
(2)当点(m,﹣2)在函数y上时,求m的值.
(3)若m=1,当﹣2≤x≤2时,求函数值y的取值范围.
(4)已知正方形ABCD的中心为原点O,点A的坐标为(1,1),当函数y与正方形ABCD有3个交点时,直接写出实数m的取值范围.
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【推荐2】如图1,抛物线
的顶点坐标为
,且经过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a697a098-036c-49d0-b10a-8710974dcf04.png?resizew=539)
(1)求抛物线的解析式;
(2)如图2,若将抛物线
中在
轴下方的图象沿x轴翻折到
轴上方,
轴上方的图象保持不变,就得到了函数
,
是
图象上的任意一点,直线
是经过
且平行于
轴的直线,过点
作直线
的垂线,垂足为
,猜想并探究:
与
的差是否为定值?如果是,请求出此定值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3f87e3fa613d0348046d2af82df356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6146669cfd4312e904b86efd55de18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12052842f5d9761ab0ba56449ead2f56.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a697a098-036c-49d0-b10a-8710974dcf04.png?resizew=539)
(1)求抛物线的解析式;
(2)如图2,若将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3f87e3fa613d0348046d2af82df356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32a64a8a89363f8ef86ee3759a0c480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32a64a8a89363f8ef86ee3759a0c480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d5f1676dc00e9b0af4656ce047170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73be30f639b301cf797d6e8d04a568d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
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【推荐1】在平面直角坐标系
中,已知抛物线
,点
.
![](https://img.xkw.com/dksih/QBM/2022/10/10/3084473372532736/3085273807749120/STEM/90d44ec2421546fd85fc23b43c056939.png?resizew=216)
(1)若此抛物线经过点A时,求a的值;
(2)求此抛物线顶点坐标(用含a的代数式表示);
(3)已知
,若抛物线与线段
恰有一个公共点,结合函数图象,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efcb2352f5b73ff2ab3394612e75df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f54dd475ff1321041c80738b201c3b6.png)
![](https://img.xkw.com/dksih/QBM/2022/10/10/3084473372532736/3085273807749120/STEM/90d44ec2421546fd85fc23b43c056939.png?resizew=216)
(1)若此抛物线经过点A时,求a的值;
(2)求此抛物线顶点坐标(用含a的代数式表示);
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8ea3c6bd88519dca0b07abbe792e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】在平面直角坐标系
中,抛物线
,过点
,且对称轴为直线
.
(1)求
的值;
(2)在
轴上有一动点
,过点
作垂直
轴的直线交抛物线于点
,
其中
.
①当
时,结合函数图象,求出
的值;
②把直线
上方的函数图象,沿直线
向下翻折,图象的其余部分保持不变,得到一个新的图象
,新图象
在
时,满足
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4736bba3d8d8960c7530404de4fdd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545c4be25cca17160e31398a4d2b8f8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/ff364d5d-ae1b-43a9-9e1f-8048efd149fe.png?resizew=138)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8739db1e52bc8401bb102c621e74d709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff60258b85de1026d0d3fa73b6e8d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②把直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be48cd4158fb76190935ab143de02ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8934767794b62fd3a93e84b242681eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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【推荐3】如图1,抛物线C1:y=ax2﹣2ax+c(a<0)与x轴交于A、B两点,与y轴交于点C.已知点A的坐标为(﹣1,0),点O为坐标原点,OC=3OA,抛物线C1的顶点为G.
![](https://img.xkw.com/dksih/QBM/2018/7/6/1982657854021632/1984074358603776/STEM/99f24be3cad34e3ab28fb001401ecfb4.png?resizew=472)
(1)求出抛物线C1的解析式,并写出点G的坐标;
(2)如图2,将抛物线C1向下平移k(k>0)个单位,得到抛物线C2,设C2与x轴的交点为A′、B′,顶点为G′,当△A′B′G′是等边三角形时,求k的值:
(3)在(2)的条件下,如图3,设点M为x轴正半轴上一动点,过点M作x轴的垂线分别交抛物线C1、C2于P、Q两点,试探究在直线y=﹣1上是否存在点N,使得以P、Q、N为顶点的三角形与△AOQ全等,若存在,直接写出点M,N的坐标:若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/7/6/1982657854021632/1984074358603776/STEM/99f24be3cad34e3ab28fb001401ecfb4.png?resizew=472)
(1)求出抛物线C1的解析式,并写出点G的坐标;
(2)如图2,将抛物线C1向下平移k(k>0)个单位,得到抛物线C2,设C2与x轴的交点为A′、B′,顶点为G′,当△A′B′G′是等边三角形时,求k的值:
(3)在(2)的条件下,如图3,设点M为x轴正半轴上一动点,过点M作x轴的垂线分别交抛物线C1、C2于P、Q两点,试探究在直线y=﹣1上是否存在点N,使得以P、Q、N为顶点的三角形与△AOQ全等,若存在,直接写出点M,N的坐标:若不存在,请说明理由.
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