在平面直角坐标系xOy中,已知抛物线y=x2-2mx+m2-1.
(1)求抛物线的顶点坐标(用含m的式子表示);
(2)若这条抛物线过点(m-2,y1),(m+n,y2),且y1<y2,结合图像,求n的取值范围.
(3)直线y=﹣x+b与x轴交于A(3,0),与y轴交于B点,过B点作垂直于y轴的直线l交这条抛物线于P、Q点,若△OAP和△OAQ中有且仅有一个为钝角三角形,结合图像,求m的取值范围.
(1)求抛物线的顶点坐标(用含m的式子表示);
(2)若这条抛物线过点(m-2,y1),(m+n,y2),且y1<y2,结合图像,求n的取值范围.
(3)直线y=﹣x+b与x轴交于A(3,0),与y轴交于B点,过B点作垂直于y轴的直线l交这条抛物线于P、Q点,若△OAP和△OAQ中有且仅有一个为钝角三角形,结合图像,求m的取值范围.
更新时间:2021-11-10 09:21:23
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【推荐1】在平面直角坐标系中,
为坐标原点,点
、
在抛物线
上,点
为该抛物线的顶点.点
为该抛物线上一点,其横坐标为
.点
关于点
的对称点
,以
为对角线构造矩形
,该矩形的边均与坐标轴垂直.
(1)求该抛物线对应的函数关系式.
(2)当
,且
轴时,作
,求
的面积.
(3)当该抛物线在矩形
内的图象对应的函数值
随
增大而增大时,求
的取值范围.
(4)设抛物线在该矩形内部及边界的图象记为
,当图象
与矩形
的边有两个交点,且这两个交点到
轴的距离和为7时,直接写出
的值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757f86c364eca9a6b15c9c9f516baf18.png)
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(1)求该抛物线对应的函数关系式.
(2)当
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(4)设抛物线在该矩形内部及边界的图象记为
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【推荐2】已知抛物线
(
,
为常数)与
轴交于A、B两点(点A在点B的左侧),与
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(1)求抛物线的解析式;并画出草图(要求标注点A、B、C、P);
(2)点A(
,
),B(
,
)在抛物线上,当
时,比较
与
的大小;
(3)在抛物线对称轴上
上,有一条自由滑动的线段EF(点E在点F的上方),已知EF=1,当
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(1)求抛物线的解析式;并画出草图(要求标注点A、B、C、P);
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【推荐1】综合与探究
抛物线
与
轴交于点
和
,与
轴交于点
,连接
.点
是线段
下方抛物线上的一个动点(不与点
,
重合),过点
作
轴的平行线交
于
,交
轴于
,设点
的横坐标为
.
(2)用关于
的代数式表示线段
,求
的最大值及此时点
的坐标;
(3)若
连接
,在
轴上是否存在点
,使得
为直角三角形,若存在,直接写出点
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(2)用关于
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(3)若
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名校
【推荐2】如图1,抛物线
交x轴于点
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交抛物线于点D(异于点A).
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(1)求抛物线的表达式;
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个单位,得到新抛物线
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的对称轴上确定一点M,使得△BDM是以BD为腰的等腰三角形,请写出所有符合条件的点M的坐标,并任选其中一个点的坐标,写出求解过程.
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(1)求抛物线的表达式;
(2)点P是直线BC上方抛物线上一动点,过点P作
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