名校
解题方法
1 . 已知二次函数
的图象如图,有下列5个结论:①
;②
;③当
时,y随x的增大而增大;④
;⑤
(其中
)其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209045c57c031f69d05333c968694a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f89938c2f0a77fdecbc1b7d166a93ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7587c2a5b662b6f0815123273945a66c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e7930731eddbcfac592b808e9b698.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次