在平面直角坐标系
中,抛物线
与
轴从左至右依次交于
,
两点,交
轴于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/ce3e4507-08db-49c6-b5e3-57ec49a9f20f.png?resizew=144)
(1)求
,
两点以及抛物线顶点的坐标;
(2)当
时,直线
平行于
且与抛物线
只有一个交点
,求点
的坐标;
(3)当
时,二次函数
有最小值
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf95d707890aa53722789a1fa7fd195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/ce3e4507-08db-49c6-b5e3-57ec49a9f20f.png?resizew=144)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca208a68dd37e00903085736eafdedb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5324645d81b339fa25ccb2951f77e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf95d707890aa53722789a1fa7fd195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8975c089a2080d34541cd1ce1ece4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24a23abf405cc224d1cd68d6bf5171f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74eb8a7738402df52d4a97262b85ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
2022·四川成都·二模 查看更多[2]
更新时间:2022-06-06 11:00:22
|
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【推荐1】如图,已知二次函数
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/c52839af-84ed-461e-bb00-6bf048724928.png?resizew=151)
(1)求抛物线的解析式;
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解答题-证明题
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适中
(0.65)
【推荐2】如图,在平面直角坐标系
中,抛物线
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两点,交y轴于点E,连接
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(1)求抛物线的解析式及顶点坐标;
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(3)点
,
,连接
,若二次函数
的图象向上平移
个单位时,与线段
有一个公共点,结合函数图象,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a65d8ff9318909d18b6e1c76f90d61f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/d5740ec6-7b69-460a-88d1-efbc7870315d.png?resizew=172)
(1)求抛物线的解析式及顶点坐标;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b465c5d8a5861b7b130e56dde8b1ae.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72d6ab9e98b8347d0cdcd990c6134f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396b08e4848f688a5fff1b804cf3f205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88dc86ad6c966febbad5cb0657dd649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
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解答题-问答题
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适中
(0.65)
【推荐1】已知抛物线y=x2+bx+c与x轴的交点为A(-1,0)和点B,与y轴的交点为C(0,-3),直线L:y=kx-1与抛物线的交点为点A和点D.
![](https://img.xkw.com/dksih/QBM/2020/12/4/2606839864229888/2609195097866240/STEM/630caa76e4314e2d858d4c64ad50bc37.png?resizew=133)
(1)求抛物线和直线L的解析式;
(2)如图,M为抛物线上一动点(不与A、D重合),当点M在直线L下方时,过点M作MN//x轴交L于点N,求MN的最大值.
![](https://img.xkw.com/dksih/QBM/2020/12/4/2606839864229888/2609195097866240/STEM/630caa76e4314e2d858d4c64ad50bc37.png?resizew=133)
(1)求抛物线和直线L的解析式;
(2)如图,M为抛物线上一动点(不与A、D重合),当点M在直线L下方时,过点M作MN//x轴交L于点N,求MN的最大值.
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【推荐2】如图,已知二次函数y=﹣x2+bx+c的图象经过A(2,0),B(0,﹣8)两点.
(1)求该二次函数的表达式;
(2)当2≤x≤5时,函数在点C处取得最大值,在点D处取得最小值,求△BCD的面积.
(1)求该二次函数的表达式;
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![](https://img.xkw.com/dksih/QBM/2021/5/2/2712425153372160/2715928849129472/STEM/4904d11bb5b24d159988248a16e9a4b5.png?resizew=165)
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名校
【推荐1】如图,抛物线
经过点
和点
.
(1)求此抛物线W的表达式;
(2)若过点
的直线l与抛物线W有且只有一个交点P,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e59dcd3103fc0aa0feb1cee7e4350ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dbb878f8fa8cad676084ee3de508416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fc5960784e2a500fd7f78340829d20.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb9c0b727f0d0efc23b609bdffa2547.png)
![](https://img.xkw.com/dksih/QBM/2021/6/20/2746970177478656/2800930094948352/STEM/ddf52594-ea31-421b-872d-e7d223dac2cd.png?resizew=194)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,二次函数y=ax2+bx+4与y轴交于C点,与x轴交于A、B两点,其中A点坐标为(﹣2,0),B点坐标为(8,0).
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(1)求经过A,B,C三点的抛物线的解析式;
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/bc6b0cb4-2f2e-4965-9cab-85e93f4f995b.png?resizew=168)
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