在平面直角坐标系xOy中(如图),已知抛物线y=x2 - bx+c经过A(-1.2)、B(0,-1)两点.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961619307782144/2962733792903168/STEM/0a658a84-bd19-4fcd-b1da-52d70cef4e2a.png?resizew=174)
(1)求抛物线的表达式及顶点P的坐标;
(2)将抛物线y=x2 - bx+c向左平移(
+1)个单位,设平移后的抛物线顶点为点P'.
①求∠BP'P的度数;
②将线段P'B绕点B按逆时针方向旋转150°,点P’落在点M处,点N是平移后的抛物线上的一点,当△MNB的面积为1时,求点N的坐标.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961619307782144/2962733792903168/STEM/0a658a84-bd19-4fcd-b1da-52d70cef4e2a.png?resizew=174)
(1)求抛物线的表达式及顶点P的坐标;
(2)将抛物线y=x2 - bx+c向左平移(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
①求∠BP'P的度数;
②将线段P'B绕点B按逆时针方向旋转150°,点P’落在点M处,点N是平移后的抛物线上的一点,当△MNB的面积为1时,求点N的坐标.
更新时间:2022-04-21 07:20:14
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(1)求抛物线的解析式.
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【推荐1】如图,抛物线经过
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【推荐2】如图,抛物线y=x2+bx+c与x轴交于A(﹣1,0),B(3,0)两点.
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