小张用描点法画二次函数
(
,
,
是常数,
)图象时,部分列表如下:
依据以上信息,判断以下结论中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![]() | … | ![]() | ![]() | 0 | 1 | … |
![]() | … | ![]() | 0 | 3 | 4 | … |
A.图象顶点在第一象限 | B.点![]() ![]() ![]() |
C.![]() ![]() ![]() | D.若![]() ![]() |
更新时间:2023-06-07 09:34:31
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【推荐1】已知
是关于
的二次函数,部分
与
的对应值如表所示:
①抛物线的对称轴为直线
;②抛物线的开口向上;③抛物线与y轴的交点坐标为
;④该函数图像向上平移2个单位后经过原点;⑤当
时,y的取值范围是
,其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
2 | ||||||||
1 | 1 | 6 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1124fedc54913766487d03da221088c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29abe9c421ef307db3c6f2ebf0cc8f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07244879732ce5d98571b0ff30313fd.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】抛物线
关于
轴对称后所得到的抛物线解析式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195fe58c4c17037ea0ad69e2c436c296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】抛物线
过四个点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdd3d3720acc13db03d16f03bc14751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f8d30ae2837bfb4b22e840fcb07d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7adaddc68475ecc6ad31da2e23326cd.png)
,若
,
,
,
四个数中有且只有一个小于零,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e71461c5134339b5b54a80e588640f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdd3d3720acc13db03d16f03bc14751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f8d30ae2837bfb4b22e840fcb07d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7adaddc68475ecc6ad31da2e23326cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5f82c6c3f876251539799aaa0b9d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9314bd1d7a6e070f4f2428f9a321804e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81ee8fc80a880ccceac24aa739fac39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】若二次函数y=x2+mx的图象的对称轴是直线x=3,则关于x的方程x2+mx=7的解为( )
A.x1=0,x2=6 | B.x1=1,x2=7 | C.x1=1,x2=-7 | D.x1=-1,x2=7 |
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