如图1,在平面直角坐标系中,四边形
是边长为3的正方形,其顶点
、
分别在
轴的正半轴和
轴的正半轴上,且抛物线
经过
、
两点,并与
轴交于另一个点
.
图1 图2
(1)求抛物线的解析式;
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2eb8bf9153c29d9fa649b6ef04467e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
更新时间:2024-04-02 08:49:01
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【推荐1】如图,在平面直角坐标系中,已知抛物线
的图象与x轴交于点A,B两点,点A坐标为
,点B坐标为
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/58c735b7-e1ae-4534-9c87-71d9d588867b.png?resizew=514)
(1)求抛物线的函数解析式;
(2)若将直线
绕点A顺时针旋转,交抛物线于一点P,交y轴于点D,使
,求直线
函数解析式;
(3)在(2)条件下若将线段
平移(点A,C的对应点M,N),若点M落在抛物线上且点N落在直线
上,求点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e190eadcaf3dc1dba9b9b4b8e9499554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/58c735b7-e1ae-4534-9c87-71d9d588867b.png?resizew=514)
(1)求抛物线的函数解析式;
(2)若将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cca2e12dd4e82ed3cf63cc10c93b995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(3)在(2)条件下若将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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【推荐2】在平面直角坐标系中,已知抛物线
(
为常数).
(1)当抛物线经过
时,求
的值.
(2)该抛物线的顶点坐标为______(用含
的代数式表示).
(3)当
时,若
时,
,则m的取值范围是______.
(4)当
时.若函数
(
为常数)的图象的最低点到直线
的距离为2,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a62efa64674523f6dfd8e0f450df71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)当抛物线经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6306b6def04d137fd2e67381b610b935.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)该抛物线的顶点坐标为______(用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba4e789b6ca08e886bc389b2572560f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e2c493cfb1cf2ad51ba1f166b80049.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91facff8cfbbcd253597f91c98e89f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a62efa64674523f6dfd8e0f450df71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
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【推荐1】正方形ABCD中,E为AD上的一点(不与A、D点重合),AD=nAE,BE的垂直平分线分别交AB、CD于F、G两点,垂足为H.
(1)如图1,当n=2时,则
= _________ ;
(2)如图1,当n=2时,求
的值;
(3)延长FG交BC的延长线于M(如图2),直接填空:当n= _________ 时,
.
(1)如图1,当n=2时,则
![](https://img.xkw.com/dksih/QBM/2013/4/16/1573638941933568/1573639142916096/STEM/719ae1bea10c46cda8594a01d079c7e5.png)
(2)如图1,当n=2时,求
![](https://img.xkw.com/dksih/QBM/2013/4/16/1573638941933568/1573639142916096/STEM/dca8a1249a0c4e80a6186a688b344ad9.png)
(3)延长FG交BC的延长线于M(如图2),直接填空:当n= _________ 时,
![](https://img.xkw.com/dksih/QBM/2013/4/16/1573638941933568/1573639142916096/STEM/bce59baf2a04447694af3d762d37dff7.png)
![](https://img.xkw.com/dksih/QBM/2013/4/16/1573638941933568/1573639142916096/STEM/f3a8cacb187c443e85881fcae22f648f.png)
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【推荐2】已知菱形ABCD中,AB=8,点G是对角线BD上一点,CG交BA的延长线于点F.
(1)求证:CG2=GE•GF;
(2)如果DG=
GB,且AG⊥BF,求cos∠F.
(1)求证:CG2=GE•GF;
(2)如果DG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/f9b33144-0c9a-438f-b831-b9c988fc2195.png?resizew=268)
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【推荐1】如图,抛物线顶点A的坐标为(1,4),抛物线与x轴相交于B、C两点,与y轴交于点E(0,3).
(1)求抛物线的表达式;
(2)已知点F(0,-3),在抛物线的对称轴上是否存在一点P,使得EP+FP最小,如果存在,求出点P的坐标;如果不存在,请说明理由.
(1)求抛物线的表达式;
(2)已知点F(0,-3),在抛物线的对称轴上是否存在一点P,使得EP+FP最小,如果存在,求出点P的坐标;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/7/7/2500862167482368/2501379174752256/STEM/d183866267ca4d9b8a4fcfb18623bce4.png?resizew=272)
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【推荐2】如图,在平面直角坐标系中,
为等腰直角三角形,
,抛物线
经过A,B两点,其中点A,C的坐标分别为
,
,抛物线的顶点为点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/43c6fdb6-0eee-4acb-bf44-dc1044401afd.png?resizew=190)
(1)求抛物线的解析式;
(2)点E是直角
斜边
上的一个动点(不与A,B重合),过点E作x轴的垂线,交抛物线于点F,当线段
的长度最大时,求点E的坐标;
(3)在(2)的条件下,抛物线上是否存在一点P,使
是以
为直角边的直角三角形?若存在,直接写出所有点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2f59980057f51e5cf3e86038cfaa16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/43c6fdb6-0eee-4acb-bf44-dc1044401afd.png?resizew=190)
(1)求抛物线的解析式;
(2)点E是直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
(3)在(2)的条件下,抛物线上是否存在一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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