如图,
,
,一抛物线顶点为
,且过
、
两点.
,
是抛物线上且位于
轴上方的点,
//
轴,
轴于点
,
轴于点
.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897018464780288/2974124298190848/STEM/37853d6c-a98e-45f4-ae36-f426893aa2a6.png?resizew=181)
(1)求抛物线解析式;
(2)若四边形
是正方形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e6dc08b0ba0a0bf43d9395da447b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010989c488d7f0551c9f2aa8bba6bf1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897018464780288/2974124298190848/STEM/37853d6c-a98e-45f4-ae36-f426893aa2a6.png?resizew=181)
(1)求抛物线解析式;
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d4cf0fb44aa1e6bdaf2a4bdfb37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10517f770b668568191d1228f21eb30.png)
21-22九年级上·安徽合肥·期末 查看更多[2]
更新时间:2022-05-07 09:34:17
|
【知识点】 特殊四边形(二次函数综合)
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,在平面直角坐标系中,已知抛物线y=ax2+2x+c(a≠0)与x轴交于点A,B,与y轴交于点C,连接BC,OA=1,OB=5,点D是此抛物线的顶点.
(1)求抛物线的表达式;
(2)抛物线上C,D两点之间的距离是 ;
(3)①点E是第一象限内抛物线上的动点,连接BE和CE,求
BCE面积的最大值;
②在①的条件下,当
BCE的面积最大时,P为y轴上一点,过点P作抛物线对称轴的垂线,垂足为M,连接ME,BP,探究EM+MP+PB是否存在最小值.若存在,请直接写出此时点M的坐标;若不存在,请说明理由.
(1)求抛物线的表达式;
(2)抛物线上C,D两点之间的距离是 ;
(3)①点E是第一象限内抛物线上的动点,连接BE和CE,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
②在①的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2022/1/5/2887727775277056/2889452604325888/STEM/fee9bc13-6d13-4b34-99f2-f5400909d5f8.png?resizew=554)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,抛物线
与直线
交于点
,
.
(1)求直线
的解析式;
(2)求该抛物线的解析式;
(3)点P是直线
下方抛物线上的一动点,过点P作x轴的平行线交
于点C,过点P作y轴的平行线交x轴于点D.
①在P点的运动过程中是否存在四边形
为平行四边形,若不存在,请说明理由;若存在,请求点P的坐标;
②求
的最大值及此时点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a23e87d16c32b5aa4357f481b5808a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/1fd467e8-fc46-49bc-aaef-f125b704e5e9.png?resizew=148)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求该抛物线的解析式;
(3)点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①在P点的运动过程中是否存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a31bb7e13c663c747a78781d0fd88c9.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186dee1a1cf68677d143172a2a50709c.png)
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