对于抛物线
.
(1)若抛物线过点
,
①求顶点坐标;
②当
时,直接写出
的取值范围为_______;
(2)已知当
时,
,求
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d1ca6f5bc42af207fd5c465d1eb6a9.png)
(1)若抛物线过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
①求顶点坐标;
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e546d27d099d383c2abff1f46139824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)已知当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f52db3046e7c92b3a7fdd6c34657663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e26026a4c162fa30379dfc14438f350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
2023·浙江宁波·一模 查看更多[7]
2023年浙江省宁波市海曙区中考一模数学试题(已下线)2023年贵州省遵义市新蒲新区中考三模数学试题(已下线)专题04 二次函数的图象与性质-学易金卷:2023年中考数学一模试题分项汇编(浙江专用)(已下线)新东方2023年中考第一次模拟考试 海曙 数学江苏省盐城市建湖县2023-2024学年九年级上学期期中数学试题2023年浙江省宁波市中考一模数学模拟试题(已下线)专题07二次函数的图象与性质(2)(4个知识点2种题型1个易错点)-【帮课堂】2023-2024学年九年级数学下册同步学与练(北师大版)
更新时间:2023-04-19 19:52:04
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适中
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【推荐1】求下列二次函数图象的对称轴和顶点坐标;
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6471b64aa6af94c5b8049a54fbedef80.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/befadacd2cb1aafd908778f26a682b1a.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4c24893a8cd7fdd86a247e7828acdd.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cc3e2adc01ebd29eeebf3226e0a930.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22db6af98fe8fb2f68da396877a641b0.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2d9575ad8a6faa8f8e791f65a75f48.png)
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【推荐2】已知抛物线
.
(1)求抛物线与两坐标轴的交点坐标;
(2)求它的顶点坐标,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d794141572c8b1e70957754f32b9eb.png)
(1)求抛物线与两坐标轴的交点坐标;
(2)求它的顶点坐标,
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【推荐1】已知抛物线
的顶点坐标为(
,-
)且经过点A(1,0),直线
恰好也经过点A
(1)分别求抛物线和直线的解析式;
(2)当x取何值时,函数值
;
(3)当
时,直接写出
和
的最小值分别为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204696a289b1f47a176eb16c1cecf8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32418803b2b7baa51ab2d838e9b6b53.png)
(1)分别求抛物线和直线的解析式;
(2)当x取何值时,函数值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966d9dd819cba29980da3700422c2497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
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【推荐2】如图,在平面直角坐标系中,抛物线
与x轴交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/61b16302-f545-46a3-a054-c13312d6d873.png?resizew=221)
(1)求抛物线
的解析式;
(2)设抛物线
关于坐标原点对称的抛物线为
,点A,B的对应点分别为
.抛物线
的顶点为E,则在x轴下方的抛物线C2上是否存在点F,使得
的面积等于
的面积.若存在,求出F点的坐标,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7938c9a3f7f3dcca8249a98f322db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ef913868c2f1fec91fcc0658293dc9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/61b16302-f545-46a3-a054-c13312d6d873.png?resizew=221)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77993759b8615ef0b42cb56ef027ff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cb2952415ec337d93bde5d85ede01c.png)
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名校
【推荐1】(1)已知
是y关于x的二次函数.求m的值;
(2)如图,二次函数
的图象与一次函数
的图象交于点
及点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a00011dfacdaa12e3243e1e861cb6.png)
①求二次函数的解析式及B的坐标
②根据图象,直按写出满足
的x的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75fbb2c826bdc4c56b1d854533dfe28.png)
(2)如图,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa40e9212ae6de9e4bbaf617f738aa56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4617c61168e1cf0a6545a57b3de6f235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a00011dfacdaa12e3243e1e861cb6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/708996f0-1d3a-4baa-9687-1f933d8e99de.jpg?resizew=137)
①求二次函数的解析式及B的坐标
②根据图象,直按写出满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c138bb47efa5fa4ed6a00764e8911692.png)
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【推荐2】在平面直角坐标系
,已知点
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上任意两点,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)求该抛物线顶点P的坐标(用含m的式子表示);
(2)当M,N的坐标分别为
时,求m的值;
(3)若对于
,都有
,求m的取值范围,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb658e90a1d3cb46c076173434c3643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba09d8d18e1f30aa335677df151e752b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)求该抛物线顶点P的坐标(用含m的式子表示);
(2)当M,N的坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fad54055e7b47f9ac920ef00c45bbd.png)
(3)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574824d85f44d42246529ac135c0391c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
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【推荐1】二次函数
的图象如图,根据图象回答下列问题:
![](https://img.xkw.com/dksih/QBM/2019/7/24/2253976934203392/2308188747718656/STEM/6fd2f478d1ca455ca32d6ffcc284715e.png?resizew=138)
(1)写出方程
的两个根;
(2)写出不等式
的解集;
(3)写出不等式
的解集;
(4)如果方程
无实数根,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://img.xkw.com/dksih/QBM/2019/7/24/2253976934203392/2308188747718656/STEM/6fd2f478d1ca455ca32d6ffcc284715e.png?resizew=138)
(1)写出方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
(2)写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84617aaab200384efeaec9a4fe71772.png)
(3)写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
(4)如果方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35a522f273be2ec41c6691229a8df023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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