如图,在平面直角坐标系
中,抛物线
与x轴交于点A,B两点(点A在点B的左侧),与y轴交于点C,对称轴是直线
.
(1)求抛物线的解析式及顶点坐标;
(2)若
和
是抛物线上两点,且
,求n的取值范围;
(3)连接
,若
是y轴左侧抛物线上的一点,N为x轴上一动点,当
,且
时,请直接写出点M的横坐标
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a0e1052290057e8e139303e59dd78c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/1/e5aad446-e1d8-475f-8da5-3a3c911e5c2e.png?resizew=155)
(1)求抛物线的解析式及顶点坐标;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecdea4e9f1eba687c4fb60b66ec26cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd092b7d9b0c3d76590c53f5a9d6bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70410f095a6d5b4b66ece2ad7bf1e461.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df95cf692ed6ea1e56cfaf3ac92c9f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1dc52a8ba9f389800eb92dbd145bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe77d909e736c36d673cc56e66ed7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea17ffdc0adcfb4f0ec4781c4e0186e9.png)
更新时间:2023-06-26 15:06:50
|
相似题推荐
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【推荐1】如图,在平面直角坐标系中,直线
分别与
,
轴交于点
,
,点
为线段
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/04eb902c-e778-41ec-9d83-67ebd452f675.png?resizew=384)
(1)求点
坐标及直线
的解析式;
(2)
为
轴上一个动点,当
时,求点
坐标;
(3)
为直线
上一个动点,
为坐标系内一点,当以
,
,
,
四个点为顶点的四边形是菱形时,直接写出点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f8e3e8f6da9ae94fdf525a8dfa4236.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/5963abe8f421bd99a2aaa94831a951e9.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/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9606a8526c82d8d64449c9515eb26e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/04eb902c-e778-41ec-9d83-67ebd452f675.png?resizew=384)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc7f54acef4e40aad465ffe5f8b4b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图,在平面直角坐标系中,二次函数y=x2+bx+c交x轴于点A(﹣3,0)、B(1,0),在y轴上有一点E(0,1),连接AE.
(1)求二次函数的表达式;
(2)若点D为抛物线在x轴负半轴下方的一个动点,求△ADE面积的最大值;
(3)抛物线对称轴上是否存在点P,使△AEP为等腰三角形?若存在,请直接写出所有P点的坐标;若不存在,请说明理由.
(1)求二次函数的表达式;
(2)若点D为抛物线在x轴负半轴下方的一个动点,求△ADE面积的最大值;
(3)抛物线对称轴上是否存在点P,使△AEP为等腰三角形?若存在,请直接写出所有P点的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/65053c23-db0b-4a12-a6d9-ff3533dac722.png?resizew=196)
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【推荐1】如图,已知抛物线
交
轴于
,
两点,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/3b52e362-5f32-4ee7-a4fd-178de38df79d.png?resizew=190)
(1)求
的值以及拋物线的顶点
的坐标;
(2)已知
为抛物线
上一点(不与点
重合),若点
关于
轴对称的点
恰好在直线
上,求点
的坐标;
(3)在(2)的条件下,平移抛物线
,使其顶点始终在直线
上,且与
相交于点
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/3b52e362-5f32-4ee7-a4fd-178de38df79d.png?resizew=190)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(2)的条件下,平移抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f8eb161297c407a6a7da3043567149.png)
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【推荐2】如图,已知抛物线
的图像经过点
,且它的顶点
的横坐标为-1,设抛物线与
轴交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/d4d943a4-414d-4183-8bfc-c852a386349c.png?resizew=315)
(1)求抛物线的解析式;
(2)求
两点的坐标;
(3)设
与
轴交于
点,连接
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e31372ebc93ef965b22d01594e06abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103874455488b7a3098a51519fdb0825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/d4d943a4-414d-4183-8bfc-c852a386349c.png?resizew=315)
(1)求抛物线的解析式;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
【推荐1】在平面直角坐标系中,已知函数
(a为常数).
(1)若
,
①当
时,y的取值范围是______;
②若
时,
,则b的取值范围是______;
(2)当
时,此函数的最大值与最小值的差是4,求a的值.
(3)设此函数图象与y轴交点为点M,过点M作y轴的垂线l,将函数图象在直线l上方部分沿直线l翻折后的图象记为
,原函数图象未翻折部分记为
,
与
组成的图象记为G,当G在直线
与直线
之间所夹的图象y随x增大而减小时,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37fc50273bcc8779d784271ad523cd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836d745b71ec18b1135e8bbf6990bffa.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccd86f1c0a10002ee8c006401b120d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e6ea1634857a9ab6926fb46ac4638f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7921cfa7621c3a86073ad0e7eb34975f.png)
(3)设此函数图象与y轴交点为点M,过点M作y轴的垂线l,将函数图象在直线l上方部分沿直线l翻折后的图象记为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165b91df44234a0789b55de06d475d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df37059ac482bc608cebfe81fda1f15f.png)
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【推荐2】在平面直角坐标系中,抛物线
与x轴交于A,B两点(点A在点B的左侧),并只经过点
中的一点.
经过C,D,E中的点_______,并求出a的值;
(2)点N是x轴上一点,点M是抛物线的顶点,连接
,是否存在一点N,使得
?若存在,求出点N的坐标;若不存在,说明理由;
(3)点
是原抛物线上一点,点P在新抛物线
上,过P作x轴的垂线交原抛物线于点G,交线段
于点Q,当点Q为线段
上靠近点F的三等分点时,存在t的值,使得
的值为定值,求出此时t的值和该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0c67b9a500191e8bcb79c424308d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d6c0665353765897bffaa8d54261a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0c67b9a500191e8bcb79c424308d54.png)
(2)点N是x轴上一点,点M是抛物线的顶点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1548ea699cfb62e06e0cb3c792424e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab796dab5bfa0b8ee6fed85f93e5f5e.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/652f18021594572cb2a92b376ec8dacc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c1d8542750d64f22e2270a300ea819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eae77f6c119efb600a64e11b5d0cb57.png)
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真题
【推荐1】在平面直角坐标系中,已知平移抛物线
后得到的新抛物线经过
和
.
(2)直线
(
)与新抛物线交于点P,与原抛物线交于点Q.
①如果
小于3,求m的取值范围;
②记点P在原抛物线上的对应点为
,如果四边形
有一组对边平行,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef476b5e912aca6ae9494fcba5a2b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8266e87262499526ef5b9e6f469376ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da50ebd2656745259525c8b157e389e6.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
①如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
②记点P在原抛物线上的对应点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762bfc20a2da28b3c59225851ea40036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73df7871b4d72a832993cc93b524f045.png)
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【推荐2】若二次函数
与
的图象关于点
成中心对称图形,我们称
与
互为“中心对称”函数.
(1)求二次函数
的“中心对称”函数的解析式;
(2)若二次函数
的顶点在它的“中心对称”函数图象上,且当
时,y最大值为2,求此二次函数解析式.
(3)二次函数
的图象顶点为M,与x轴负半轴的交点为A、B,它的“中心对称”函数
的顶点为N,与x轴的交点为C、D,从左往右依次是A、B、C、D,若
,且四边形
为矩形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e94556fc78e40aef7e9a3212f1ae24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c56c4470b8458d43bff92423caf83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f449cadb49859b80c31ef1f68bfe81b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3011939315dd9289daff02fe94e8c9e5.png)
(2)若二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856efbc951ade577bb87cb24f0a1c7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee313050b07ab6facea613cd1f6492b.png)
(3)二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be361af3a95b70b85724b35ce9b5a3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85177448549985501b9e7142c0ce4622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a6fa5218491da01843cdfde0c3dcbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2321c8b7bfe7289f553f5d0ae6660bdf.png)
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【推荐3】对于某个函数,若自变量取实数
,其函数值恰好也等于
时,则称
为这个函数的“等量值”.在函数存在“等量值”时,该函数的最大“等量值”与最小“等量值”的差
称为这个函数的“等量距离”,特别地,当函数只有一个“等量值”时,规定其“等最距离”
为0.
(1)请分别判断函数
,
,
有没有“等量值”?如果有,直接写出其“等量距离”;
(2)已知函数
.
①若其“等量距离”为0,求
的值;
②若
,求其“等量距离”
的取值范围;
③若“等量距离”
,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(1)请分别判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9d2c0d12d8d8c15cbcf86a98ae173a.png)
①若其“等量距离”为0,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973c519b06cae9ae921fdb12c273833b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
③若“等量距离”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0f3f15905e4da111b62bb855a81ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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