1 . 如图1,在平面直角坐标系中,抛物线
与
轴交于点
,
点
在点
的左侧
,交
轴于点
,点
的坐标为
,点
为抛物线的顶点,对称轴与
轴交于点
.
_________,点
的坐标是 _________;
(2)连接
,点
是线段
上一动点
点
不与端点
,
重合
,过点
作
,交抛物线于点
点
在对称轴的右侧
,过点
作
轴,垂足为
,交
于点
,点
是线段
上一动点,当
的周长取得最大值时,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c63d1febf25cdde83737a9afdca1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
的最小值;
(3)在(2)中,当
的周长取得最大值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c63d1febf25cdde83737a9afdca1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
取得最小值时,如图
,把点
向下平移
个单位得到点
,连接
,把
绕点
顺时针旋转一定的角度
,得到
,其中边
交坐标轴于点
.在旋转过程中,是否存在一点
,使得
?若存在,请直接写出所有满足条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e71461c5134339b5b54a80e588640f.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/7986887b83aab178ae991d8e4c2696e2.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/987517758fad59f6f695761deb2a5ebd.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b473ca719ebceaad3ccf097bb944f938.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277696e8d9f58c9ec28887783b317e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a53d82f9d27fab1ca605732ec507bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693a91d4dab6aa1dc59aba9b575ac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e1b7c631060f098502c55d2726d586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be2a5ced4241b715e4110885c6c77b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c63d1febf25cdde83737a9afdca1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
(3)在(2)中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be2a5ced4241b715e4110885c6c77b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c63d1febf25cdde83737a9afdca1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128147bd4834566a78b4e9d2a3b2139c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883866e7cae237015ea63d0ece6b9a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35a6ef33406256c8dcccc9a915c9d018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50876b3f3f74193245abaa84262ecee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f159bdf3e82d6b58ad696ed844ab6d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94a5ff197dc688cc8cd754154c152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
您最近一年使用:0次
2024九年级下·全国·专题练习
2 . 已知抛物线
经过点
,它的对称轴为直线
,对称轴与
轴交于点
,抛物线与
轴交于点
.
(1)求
,
的值;
(2)若点
为抛物线上不与
,
重合的点,且
,求证:
,
,
三点共线;
(3)当
时,二次函数
的最大值为
,最小值为
,并且满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a149d6036c8774340f130d639aa710ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edda6261f4b7eed205250df231cbe9a4.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/8455657dde27aabe6adb7b188e031c11.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8564383ed064b09a9af58e8598a7e3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b58d3f03be3b25af4ea9c3758a3064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
3 . 在平面直角坐标系中,直线
与x轴交于点A,与y轴交于点B,抛物线
经过A,B两点,并与x轴的正半轴交于点C.
(2)当
时,若点P是抛物线对称轴上的一个动点,求
周长的最小值
(3)当
时,若点
是直线
下方抛物线上的一个动点,当m取何值时,
的面积最大?并求出
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527644f53abbcfd2e8457da020cb0262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37efb179686525e1a0aec162008f605.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51e2b8f615b2cc7eca7fda25efb507d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005f97358b620c0e9f96aff7a18b2a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
您最近一年使用:0次
4 . 如图①,在平面直角坐标系中,抛物线
(b、c为常数)与x轴交于A、B两点(点A在点B左侧),与y轴交于点
),抛物线的对称轴为直线
,过B、C两点作直线l,点P在抛物线上,且在直线l下方,连结
,交
于点Q.
(2)求点A和点B的坐标,并直接写出直线l的表达式;
(3)求
的最大值,及此时点P的坐标;
(4)如图②,点C关于x轴的对称点为点D,点R在线段
上,连接
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c79c84836922b96df5ae7ccd23288a7.png)
的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c92187d7f16ee7d25d1be33c3e09b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求点A和点B的坐标,并直接写出直线l的表达式;
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309a2878b50bd2a02364f52bcfe5354e.png)
(4)如图②,点C关于x轴的对称点为点D,点R在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638f89746a35b59f1b492ef20ca85156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c79c84836922b96df5ae7ccd23288a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
您最近一年使用:0次
5 . 如图,抛物线
与x轴交于
,
两点,与y轴交于点C.P是抛物线上的任意一点(不与点C重合),点P的横坐标为m,抛物线上点C与点P之间的部分(包含端点)记为图象G.
(2)当m符合什么条件时,图象G的最大值与最小值的差为4?
(3)将线段
先向左平移1个单位长度,再向上平移5个单位长度,得到线段
.若抛物线
平移后与线段
有两个交点,且这两个交点恰好将线段
三等分,求抛物线平移的最短路程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688e997d4de2710f59eb71ad10c83365.png)
(2)当m符合什么条件时,图象G的最大值与最小值的差为4?
(3)将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
您最近一年使用:0次
6 . 如图,抛物线
与
轴交于
,
两点,与
轴交于点
.
是抛物线上的任意一点(不与点
重合),点
的横坐标为
,抛物线上点
与点
之间的部分(包含端点)记为图象
.
(2)当
符合什么条件时,图象
的最大值与最小值的差为4?
(3)将线段
先向左平移1个单位长度,再向上平移5个单位长度,得到线段
.若抛物线
平移后与线段
有两个交点,且这两个交点恰好将线段
三等分,求抛物线平移的最短路程;
(4)当
时,若图象
与平行于
轴的直线
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/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688e997d4de2710f59eb71ad10c83365.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(3)将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814fef45a1f56a603507946bfe4a8f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
7 . 已知抛物线
顶点
的横坐标为
,且经过点
.点
在该抛物线上,其横坐标为
.
(1)求此抛物线对应的函数表达式;
(2)当
时,求函数
的最大值和最小值;
(3)当
时,直接写出
的面积;
(4)将此抛物线上
,
两点之间的部分(包括
,
两点)记为图像
,当图像
与直线
只有一个公共点时,直接写出
的取值范围.
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b2cc0d2f6d3eee9a33db83e0c0830d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求此抛物线对应的函数表达式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836d745b71ec18b1135e8bbf6990bffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(4)将此抛物线上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78e63c039867b9d64b10f20671bb157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
8 . 如图,在平面直角坐标系中,抛物线
(
、
为常数)的对称轴为直线
,且经过点
.
(2)当
时,二次函数的最大值是______,最小值是______;
(3)当
时,若二次函数的最大值和最小值的差为
,求
的值;
(4)点
在抛物线上,横坐标为
,过点
作直线
平行于
轴,交抛物线于另一点
.抛物线上另有两点
、
,横坐标分别为
和
,
、
两点之间的部分
不包括
、
两点
记作图象
.若图象
上恰好有三个点到直线
的距离为
,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d41e173f51460bf0573cb3ac27e61.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9e5fdd911a03ea15e78d47b50c4adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29418e5014731850c55565b6bf47aa41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2024-04-03更新
|
143次组卷
|
3卷引用:2023年吉林省松原市前郭县学区五校中考第五次数学模拟预测题
9 . 在平面直角坐标系中,我们把横坐标和纵坐标互为相反数的点称为“相反点”,例如点
,
,都是“相反点”,若二次函数
的图象上有且只有一个“相反点”
,当
时,二次函数
的最小值为
,最大值为
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5030685d4bfdaba51d78d4678f3e101c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cb14bdd6607aba8a5aee7158b4a116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a13ec30801fb4f6ccb49b3ef5ecab52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23023baa687875dcf8ebdb99652535dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba4e789b6ca08e886bc389b2572560f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a13ec30801fb4f6ccb49b3ef5ecab52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af31ae78b8d67797eda6da26724eef9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-04-11更新
|
121次组卷
|
2卷引用:2024年山东省济南市济阳区九年级中考数学一模模拟试题
名校
10 . 某排球运动员在原点O处训练发球,为球网,
为球场护栏,且
,
均与地面垂直,球场的边界为点K,排球(看作点)从点O的正上方点
处发出,排球经过的路径是抛物线L的一部分,其最高点为G,落地点为点H,以点O为原点,点O,M,H,K,A所在的同一直线为x轴建立平面直角坐标系,相应点的坐标如图所示,点N的坐标为
(单位:米,图中所有的点均在同一平面内).
(1)求抛物线L的函数表达式;
(2)通过计算判断发出后的排球能否越过球网?是否会出界?
(3)由于运动员作出调整改变了发球点P的位置,使得排球在点K落地后立刻弹起,又形成了一条与L形状相同的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2024-03-28更新
|
508次组卷
|
2卷引用:河北省石家庄市2023-2024学年九年级下学期开学考试数学试题