关于二次函数
的最大(小)值,叙述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cde40a847189607335ab8866f40a66.png)
A.当![]() | B.当![]() |
C.当![]() | D.当![]() |
更新时间:2018-10-06 11:09:11
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单选题
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较易
(0.85)
【推荐1】对于抛物线y=﹣![](https://img.xkw.com/dksih/QBM/2020/10/9/2567439306653696/2567957441740800/STEM/0ec82dbeb08547de88835a993a4dbdd4.png?resizew=6)
(x﹣1)2+2的说法错误的是( )
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567439306653696/2567957441740800/STEM/0ec82dbeb08547de88835a993a4dbdd4.png?resizew=6)
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567439306653696/2567957441740800/STEM/0ec82dbeb08547de88835a993a4dbdd4.png?resizew=6)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/cca7fef6-a7c6-4f9d-b066-43178b3a0ae8.png?resizew=169)
A.抛物线的开口向下 |
B.抛物线的顶点坐标是(1,2) |
C.抛物线的对称轴是直线 x=1 |
D.当x<1时,y随x的增大而减小 |
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【推荐2】已知抛物线
的顶点在第四象限,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff72256cd8e90a87d617ace568ed6013.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】关于抛物线
,下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f57c5d08e534712f29c041ee91478d.png)
A.开口向下 | B.顶点坐标是![]() |
C.对称轴是直线![]() | D.当![]() ![]() ![]() |
您最近一年使用:0次