已知抛物线
与
轴交于
,
,该函数在
时,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723918c6bdacffde05ce1c11f66aa8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d1b0e316f658f4ffe056511101614d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37461b15d3b31b5611c4f069207e921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2120843f946b5515c9cd61ddc0d0f0ce.png)
A.有最小值![]() | B.有最小值0,有最大值3 |
C.有最小值![]() | D.有最小值![]() |
2023九年级·全国·专题练习 查看更多[3]
(已下线)22.1二次函数图像与性质(题型精讲精练)2(已下线)22.1二次函数图像与性质(题型精讲精练)1(已下线)第07讲 二次函数与一元二次方程(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(苏科版)
更新时间:2023-11-21 11:45:15
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【推荐1】二次函数
的图象如图所示,下列结论中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/428e85f1-254f-44ec-bc4b-d71851ba9065.png?resizew=154)
①
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①
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】对于一个函数,自变量x取a时,函数值y也等于a,我们称a为这个函数的不动点.如果二次函数y=x2+4x+c有两个相异的不动点x1,x2,且x1<3<x2,则c的取值范围是( )
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A.![]() ![]() | B.3或![]() | C.![]() ![]() | D.![]() |
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