如图,在平面直角坐标系中,二次函数
的图像与
轴交于
,
两点,与
轴交于点
,且
.
(1)求直线
的表达式;
(2)求该二次函数的解析式,并写出函数值
随
的增大而减小时
的取值范围;
(3)点
是抛物线上的一个动点,设点
的横坐标为
.当
的面积取最大值时,求点
的坐标;
(4)当
时,二次函数的最大值与最小值的差是一个定值,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc381ec69d507f6f2181df98c3888ab.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/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/cb8932bcabf425713fbb0d4cca9714f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/6/b1295e59-ee5f-4d00-89c2-32e42d99aa07.png?resizew=156)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
(2)求该二次函数的解析式,并写出函数值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)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/2dd9b2cf1cab81c0b6428c32bf3ac4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac779b70bd71ae3a77721efb04c62b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba4e789b6ca08e886bc389b2572560f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
22-23九年级上·吉林·期末 查看更多[5]
吉林省吉林市龙潭区亚桥第二九年制学校2022-2023学年九年级上学期期末数学试题(已下线)专题22.10 二次函数章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(人教版)(已下线)专题21.14 二次函数与反比例函数章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(沪科版)(已下线)专题1.10 二次函数章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(浙教版)(已下线)2024年湖北省初中学业水平考试一模考试数学试题及变式题21-24题
更新时间:2023-08-27 21:00:58
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【推荐1】如图,在平面直角坐标系中,抛物线y=ax2+bx+4交x轴于点A(﹣2,0)和B(B在A右侧),交y轴于点C,直线y=
经过点B,交y轴于点D,且D为OC中点.
(1)求抛物线的解析式;
(2)若P是第一象限抛物线上的一点,过P点作PH⊥BD于H,设P点的横坐标是t,线段PH的长度是d,求d与t的函数关系式;
(3)在(2)的条件下,当d=
时,将射线PH绕着点P顺时针方向旋转45°交抛物线于点Q,求点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbefd8e89fcc5c420dbb642115307cc.png)
(1)求抛物线的解析式;
(2)若P是第一象限抛物线上的一点,过P点作PH⊥BD于H,设P点的横坐标是t,线段PH的长度是d,求d与t的函数关系式;
(3)在(2)的条件下,当d=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f73e1f479085efaa877b82fbffe6ca.png)
![](https://img.xkw.com/dksih/QBM/2018/11/3/2067769419153408/2068896994353152/STEM/aa75de6616f64b009c287c7614d1509f.png?resizew=397)
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【推荐2】如图,在平面直角坐标系中,一次函数
的图象与x轴,y轴分别交于A,B两点,以AB为边在第二象限内作等腰直角三角形ABC,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/a7bb5d99-02f5-430f-8779-735ce1a1752d.png?resizew=233)
(1)求直线BC的函数解析式;
(2)点P为线段AB上一动点,过点P作
轴交BC于点Q.当
时,求四边形APQC的面积及此时点P的坐标;
(3)如图2,将一次函数
的图象向左平移2个单位长度得到直线l,点M和点N均在直线BC上运动,点G为直线l上一动点,若以点A、N、G、M为顶点的四边形为矩形,直接写出MN的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/5faf0fb7-e53b-4b77-b341-6acb56e7dcbc.png?resizew=186)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/a7bb5d99-02f5-430f-8779-735ce1a1752d.png?resizew=233)
(1)求直线BC的函数解析式;
(2)点P为线段AB上一动点,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548776b62e7a92e1b11f5aeaf4d52392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e908763215f6c8e2f69662d8b8aa34b.png)
(3)如图2,将一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
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【推荐1】如图
,抛物线
(
,
)的顶点为
,与
轴交于
,
两点,我们发现在
轴下方的抛物线的形状很像一口锅,于是我们作如下新的定义:以
为弦,在
上方作弧
,取图
中
、
两点之间的抛物线部分,把
,
两点之间的抛物线部分与弧
所围成的封闭图形称为“锅线”,如图
,记为“锅线
”,顶点
称为“锅底”,点
到线段
的距离称为“锅深”,弧
称为“锅盖”,弧
的中点
到线段
的距离称为“锅盖高”,若
为等腰直角三角形,则此“锅线”称为“标准锅线”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/a64be2e2-9f99-4e55-9613-6a56a3827116.png?resizew=569)
(1)若图
中的“锅线”为“标准锅线”,“锅盖高”为
,“锅深”为
,
求抛物线的解析式.
求弧
所在圆的圆心坐标;
(2)在(
)的情况下,如图
,在“标准锅线”上是否存在一点
,使得
,如果存在,请求出点
的坐标,如果不存在,请说明理由;
(3)在(
)的情况下,将图
的“标准锅线
”绕点
顺时针旋转
得到新的“标准锅线
”,如图
,过点
作直线
轴交“标准锅线
”于点
,在线段
上取一点
,过点
作直线
交“标准锅线
”于点
、
两点,请直接写出线段
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9dc95911426429212f0db7f59adaa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/a64be2e2-9f99-4e55-9613-6a56a3827116.png?resizew=569)
(1)若图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40068d7c451f7c3afc22a102e255d2d5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbdcc597b410225b233a97258c9ac02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)在(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9eac288daa06405ee3104502ac15141.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9fdc253e091e2b3aefed921292a96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9eac288daa06405ee3104502ac15141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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【推荐2】如图,二次函数
的图象经过坐标原点,与
轴交于点
.
(1)求此二次函数的解析式;
(2)在抛物线上存在一点
,且满足
,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530a9976281288e0b1e1fb2601ebf18e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/1f48c513-c30e-40ec-91f7-39fab2f58e7f.png?resizew=99)
(1)求此二次函数的解析式;
(2)在抛物线上存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2785ac883ae9b1f7e0259978d01fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图, 在平面直角坐标系中,点A,B分别是
轴正半轴,
轴正半轴上两动点,
,
,以AO,BO为邻边构造矩形AOBC,抛物线
交
轴于点D,P为顶点,PM⊥
轴于点M.
(1)求
,
的长(结果均用含
的代数式表示).
(2)当
时,求该抛物线的表达式.
(3)在点
在整个运动过程中.
①若存在
是等腰三角形,请求出所有满足条件的
的值.
②当点A关于直线DP的对称点
恰好落在抛物线
的图像上时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7a332404aa03c74725edd2c53f30cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6f5797edab2d8c194650a7187f8376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529fb44d01db133c23de6b36669f6643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bab6039809a0defa8d71ff388a582b7.png)
(3)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
①若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a93081467096efb97230c0bb1ad7c21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
②当点A关于直线DP的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529fb44d01db133c23de6b36669f6643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/aac0c6cf-f7c9-412b-938e-fad23754b982.png?resizew=193)
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【推荐2】如图,点P(x,y1)与Q(x,y2)分别是两个函数图象C1与C2上的任一点.当a≤x≤b时,有﹣1≤y1﹣y2≤1成立,则称这两个函数在a≤x≤b上是“相邻函数”,否则称它们在a≤x≤b上是“非相邻函数”.例如,点P(x,y1)与Q(x,y2)分别是两个函数y=3x+1与y=2x﹣1图象上的任一点,当﹣3≤x≤﹣1时,y1﹣y2=(3x+1)﹣(2x﹣1)=x+2,通过构造函数y=x+2并研究它在﹣3≤x≤﹣1上的性质,得到该函数值的范围是﹣1≤y≤1,所以﹣1≤y1﹣y2≤1成立,因此这两个函数在﹣3≤x≤﹣1上是“相邻函数”.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943157892718592/2943681907769344/STEM/7eabbb03-b56f-48a8-8902-bc9fb73007cf.png?resizew=274)
(1)判断函数y=3x+2与y=2x+1在﹣2≤x≤0上是否为“相邻函数”,并说明理由;
(2)若函数y=
与y=﹣2x+a在1≤x≤2上是“相邻函数”,请求出a的最大值与最小值.
(3)若函数y=x2﹣(2a﹣1)x与y=x﹣2在1≤x≤2上是“相邻函数”,求a的取值范围.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943157892718592/2943681907769344/STEM/7eabbb03-b56f-48a8-8902-bc9fb73007cf.png?resizew=274)
(1)判断函数y=3x+2与y=2x+1在﹣2≤x≤0上是否为“相邻函数”,并说明理由;
(2)若函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c943d7b6ce65c70e98d62e3664168ab.png)
(3)若函数y=x2﹣(2a﹣1)x与y=x﹣2在1≤x≤2上是“相邻函数”,求a的取值范围.
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【推荐3】如图,抛物线过点A(0,1)和C,顶点为D,直线AC与抛物线的对称轴BD的交点为B(
,0),平行于y轴的直线EF与抛物线交于点E,与直线AC交于点F,点F的横坐标为
,四边形BDEF为平行四边形.
(1)求点F的坐标及抛物线的解析式;
(2)若点P为抛物线上的动点,且在直线AC上方,当△PAB面积最大时,求点P的坐标及△PAB面积的最大值;
(3)在抛物线的对称轴上取一点Q,同时在抛物线上取一点R,使以AC为一边且以A,C,Q,R为顶点的四边形为平行四边形,求点Q和点R的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
(1)求点F的坐标及抛物线的解析式;
(2)若点P为抛物线上的动点,且在直线AC上方,当△PAB面积最大时,求点P的坐标及△PAB面积的最大值;
(3)在抛物线的对称轴上取一点Q,同时在抛物线上取一点R,使以AC为一边且以A,C,Q,R为顶点的四边形为平行四边形,求点Q和点R的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/be22779e-ae38-4634-96a2-3915a23f87f2.png?resizew=277)
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【推荐1】如图1,抛物线与x轴交于A、B两点,与y轴交于点C(0,3),且OB=OC=3AO.直线y=x+1与抛物线交于A、D两点,与y轴交于点E.设直线AD上方的抛物线上的动点P的横坐标为t.
![](https://img.xkw.com/dksih/QBM/2019/7/19/2249995893743616/2257154508136448/STEM/3f220775ebb340418da98756e63b3228.png?resizew=350)
(1)求该抛物线的表达式及点D的坐标;
(2)如图1,当t为何值时,S△PAD=
S△DAB;
(3)如图2,过点P作PF∥x轴,交直线AD于点F,PG⊥AD于点G,GH⊥x轴于点H.
①求△PFG的周长的最大值;
②当PF=
GH时,求t的值.
![](https://img.xkw.com/dksih/QBM/2019/7/19/2249995893743616/2257154508136448/STEM/3f220775ebb340418da98756e63b3228.png?resizew=350)
(1)求该抛物线的表达式及点D的坐标;
(2)如图1,当t为何值时,S△PAD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)如图2,过点P作PF∥x轴,交直线AD于点F,PG⊥AD于点G,GH⊥x轴于点H.
①求△PFG的周长的最大值;
②当PF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐2】如图所示,对称轴为直线
的抛物线
与
轴交于
、
两点,与
轴交于点
,点
在抛物线对称轴上并且位于
轴的下方,以点
为圆心作过
、
两点的圆,恰好使得弧
的长为
周长的
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/22f0b388-ce27-4956-a13f-87e8ff06d650.png?resizew=204)
(1)求该抛物线的解析式;
(2)求
的半径和圆心
的坐标,并判断抛物线的顶点
与
的位置关系;
(3)在抛物线上是否存在一点
,使得
?若存在,求出所有符合条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.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/5963abe8f421bd99a2aaa94831a951e9.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/1c6b1ca85ab21ca36d4e4893411119a5.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/dad2a36927223bd70f426ba06aea4b45.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/22f0b388-ce27-4956-a13f-87e8ff06d650.png?resizew=204)
(1)求该抛物线的解析式;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.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/2d1d9218917d85a1dc19e60f076b8bfa.png)
(3)在抛物线上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb430fbc5d8f5f688f3a99939c0402a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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