已知直线
与抛物线
有一个公共点
,且
.
(1)求抛物线顶点
的坐标(用含
的代数式表示);
(2)说明直线与抛物线有两个交点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f9bd7fdb0c44b5e2e1d5a59dd6f7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba927a64e3746935090ebc38772a6fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a29ba49963134a7232fa8574105fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
(1)求抛物线顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)说明直线与抛物线有两个交点.
更新时间:2020-11-03 19:17:39
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dabe2871e9e83717b9c805aab6a372c.png)
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