如图,抛物线与x轴相交于B,C两点,与y轴相交于点A,点P(
,
)(a是任意实数)在抛物线上,直线
经过A,B两点.
![](https://img.xkw.com/dksih/QBM/2015/1/30/1573791891193856/1573791897640960/STEM/a897dbb286ba46988b89f5969a154242.png)
(1)求直线AB的解析式;
(2)平行于y轴的直线
交直线AB于点D,交抛物线于点E.
①直线
(0≤t≤4)与直线AB相交F,与抛物线相交于点G.若FG∶DE=3∶4,求t的值;
②将抛物线向上平移m(m>0)个单位,当EO平分∠AED时,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd638e15f4606b20db9a2cf0851ad8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://img.xkw.com/dksih/QBM/2015/1/30/1573791891193856/1573791897640960/STEM/a897dbb286ba46988b89f5969a154242.png)
(1)求直线AB的解析式;
(2)平行于y轴的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f7b16d65f1b2b8bea8cf4a83fde925.png)
②将抛物线向上平移m(m>0)个单位,当EO平分∠AED时,求m的值.
更新时间:2016-12-05 22:30:43
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适中
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【推荐1】如图,已知抛物线
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(1)求抛物线的解析式;
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【推荐2】如图,已知:二次函数
的图象与
轴交于
,
两点,其中
点坐标为
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(2)抛物线的对称轴上有一动点
,求出当
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的坐标;
(3)若抛物线上有一动点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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