设二次函数
,已知函数值y和自变量x的部分对应取值如下表:
若
,则a的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdcdeae81228ee072cc8f36fbf8c541.png)
x | … | 0 | 1 | 2 | 3 | 4 | … |
y | … | ![]() | m | n | p | ![]() | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bdc69abbcdf98c42b649f8d8d4cd1ed.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
更新时间:2023-12-10 22:58:23
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【知识点】 二次函数图象与各项系数符号解读
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单选题
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适中
(0.65)
【推荐1】二次函数
的图象如图所示,下列结论中:①
;②
;③
;④
,其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/25/fb7242ff-b724-4d7e-8826-95fd08b826e3.png?resizew=209)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bddb3428b4402a70cfee1fffb8d08d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0949ce24c868813dfba767b6fb277538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a134e2ccd3cc5fa8cf9da498461776f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/25/fb7242ff-b724-4d7e-8826-95fd08b826e3.png?resizew=209)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】抛物线
的部分图象如图所示,与
轴的一个交点坐标为
,抛物线的对称轴是直线
.下列结论中:①
;②
;③
;④若点
在该抛物线上,则
.其中正确的有( )
![](https://img.xkw.com/dksih/QBM/2021/10/11/2826947342557184/2831347531325440/STEM/4b91ca85-828c-4b17-bb5b-9bb72891209e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f097626288a034e4984d5bee390968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66c5f00b5b38a2d052354b5611970e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c97173423a3351792c8cf77c4bf004.png)
![](https://img.xkw.com/dksih/QBM/2021/10/11/2826947342557184/2831347531325440/STEM/4b91ca85-828c-4b17-bb5b-9bb72891209e.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次