如图,二次函数
的图形与
轴交于
两点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035df3b539d4cbe9f39354d170ec9cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd014218e0ef5b84d7d4789b24ce7735.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/3261e50a-be1f-4e50-9c45-685a5b08a2b6.png?resizew=152)
A.![]() ![]() | B.点A的坐标为![]() |
C.![]() | D.当![]() |
更新时间:2023-11-07 14:50:47
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【推荐1】对于抛物线
,下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2f8c6f36003fff19f8cca01f4cebee.png)
A.函数最小值是3 | B.抛物线的顶点坐标是![]() |
C.对称轴为直线![]() | D.当![]() |
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【推荐2】对于抛物线
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d1223cc2c9a205d6cf0e30aa97bb9.png)
A.开口向下,顶点坐标![]() | B.开口向上,顶点坐标![]() |
C.开口向下,顶点坐标![]() | D.开口向上,顶点坐标![]() |
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【推荐1】如图,已知二次函数
(
,
,
为常数,且
)的图象顶点为
,经过点
.有以下结论:①
;②
;③
时,
随
的增大而减小;④对于任意实数
,总有
,其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/2c6cbd8a-077a-4f32-bfab-ce1e9763562d.png?resizew=162)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dda1d7b3982b398ffa32f3dbfdfe787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d01c32cf82622d2832bdd2f2d1f6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5f37fc299a64e38a724395c0edfc4b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/2c6cbd8a-077a-4f32-bfab-ce1e9763562d.png?resizew=162)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】已知二次函数
的图象的对称轴为直线
,其图象如图所示,现有下列结论:①
;②
;③
;④
;⑤
.其中正确结论的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5469918fc2803d9d5b2951b3296fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54d15b35d41cbf25d6830c5f2a79884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f89938c2f0a77fdecbc1b7d166a93ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/2/f0be7756-8abe-4adb-bf36-874727682b1b.png?resizew=173)
A.②③④ | B.②③⑤ | C.②④⑤ | D.①②⑤ |
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【推荐1】如图所示的抛物线是二次函数
(a≠0)的图象,则下列结论:①abc>0;②b+2a=0;③抛物线与x轴的另一个交点为(4,0);④a+c>b;⑤3a+c<0.其中正确的结论有
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/baa8c95a-1e6f-45e6-bcd2-1813ac354a98.png?resizew=127)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/baa8c95a-1e6f-45e6-bcd2-1813ac354a98.png?resizew=127)
A.5个 | B.4个 | C.3个 | D.2个 |
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【推荐2】如图,二次函数
的图象与x轴的一个交点为
,对称轴是直线
,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ac55c5a8ad17e77e16e842af460186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
A.![]() | B.![]() | C.![]() | D.点![]() |
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【推荐1】关于函数
,下列说法错误的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d97ace95033b68c8f0cfc92eeeeab24.png)
A.图象与![]() ![]() ![]() |
B.当![]() ![]() |
C.将图象向下平移3个单位,向右平移1单位得到抛物线![]() |
D.图象与![]() ![]() |
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【推荐2】抛物线
与
轴的交点坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e61e0a1bc2ab34fe0cd1de9f59b0e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.(0,2) | B.(![]() | C.(2,0) | D.(0,![]() |
您最近一年使用:0次