在平面直角坐标系xOy中,抛物线
与y轴交于C点,与x轴交于A,B两点(点A在点B左侧),且点A的横坐标为-1.
![](https://img.xkw.com/dksih/QBM/2015/7/7/1573865105424384/1573865111961600/STEM/4f8edf21708049edb535764a72bd26ff.png)
(1)求a的值;
(2)设抛物线的顶点P关于原点的对称点为
,求点
的坐标;
(3)将抛物线在A,B两点之间的部分(包括A, B两点),先向下平移3个单位,再向左平移m(
)个单位,平移后的图象记为图象G,若图象G与直线
无交点,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08b4aca846913911b5e35c6c222e40b.png)
![](https://img.xkw.com/dksih/QBM/2015/7/7/1573865105424384/1573865111961600/STEM/4f8edf21708049edb535764a72bd26ff.png)
(1)求a的值;
(2)设抛物线的顶点P关于原点的对称点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff25ce72b28adee40dc61a8c1e995f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff25ce72b28adee40dc61a8c1e995f1f.png)
(3)将抛物线在A,B两点之间的部分(包括A, B两点),先向下平移3个单位,再向左平移m(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ee36f4cdcef902aa4fa3905cb35dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe56a35560ee6701e8a9545a931a49cb.png)
更新时间:2016-12-06 00:34:05
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【推荐1】如图,水池中心点
处竖直安装了一跟水管,水管上端有一喷头,可喷出形似抛物线的水柱,当喷头上下移动时,喷出的抛物线型水柱也会随之竖直上下平移,但水柱落点与
点始终保持在同一水平面,安装师傅调试后发现,当喷头距地面高2.5米时,水柱落点到
点的水平距离为2.5米,此时,喷头喷出水柱的最高点距离水管的水平距离为0.5米.
(2)若要使喷出的水柱落点距
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐2】在初中阶段的函数学习中,我们经历了“确定函数的表达式—利用函数图象研究其性质—运用函数解决问题”的学习过程.探究
图像和性质:
(1)由上表可知,
__________,
__________.
(2)在给出的平面直角坐标系中,请用你喜欢的方法画出这个函数的图象,并写出这个函数的一条性质:______________________________.
(3)若方程
只有2个不同的实数解,请直接写出
的值或取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0172c917b9c7ed44174f6f0d15f60b.png)
… | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | … | |
… | 3 | 0 | -1 | 0 | 3 | 0 | -1 | 0 | 3 | … |
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(2)在给出的平面直角坐标系中,请用你喜欢的方法画出这个函数的图象,并写出这个函数的一条性质:______________________________.
(3)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69573626771b7f8d260643a183d6ee75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/7ed06642-c04d-4e98-9441-dfb3474a629b.png?resizew=214)
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【推荐1】在平面直角坐标系中,抛物线
的表达式为
,先将抛物线
向上平移4个单位长度,再向右平移若干个单位长度后得到抛物线
,抛物线
与
轴交于原点和点
.
(1)求抛物线
的表达式及顶点坐标.
(2)若抛物线
上有一动点
,当点
到
轴的距离不大于3时,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
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(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若抛物线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72850427e83ff19a24305783e080b280.png)
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【推荐2】如图,在平面直角坐标系
中,半径为
的
交y轴正半轴于点A,弦
于点D,且
,点C在点B的右侧,过点A的切线交
的延长线于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/a8ddfa29-d886-48f0-a1e4-9db612c4f936.png?resizew=122)
(1)求点E的坐标;
(2)直接写出图中阴影部分的面积为______;
(3)请直接写出抛物线
______(填“是”或“否”)经过点B,若将此抛物线向下平移
个单位,则所得的抛物线的顶点坐标为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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(1)求点E的坐标;
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(3)请直接写出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa54808292c9f3470e7eaf75a347f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34e01955f8c8fe2f0041b35d8d602a7.png)
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