已知函数
(
是常数,
≠0),下列结论正确的是
![](https://img.xkw.com/dksih/QBM/2016/6/29/1574215079460864/1574215085842432/STEM/932bbda5f5b44646a6b66ba32817bcb9.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1574215079460864/1574215085842432/STEM/84982a7423d449fc96c014273dcfa276.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1574215079460864/1574215085842432/STEM/84982a7423d449fc96c014273dcfa276.png)
A.当![]() |
B.当![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
更新时间:2016-06-29 14:44:32
|
【知识点】 y=ax²+bx+c的图象与性质解读
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