已知二次函数
(a,b,c为常数,且
)的图象如图所示,其对称轴为直线
,且经过点
,给出下列结论:①
;②
;③
;④
(m为任意实数),正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4fd84394e897ebf6c4814b841d427b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc20d351d51723c9b0a07a20ac14114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5469918fc2803d9d5b2951b3296fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452e47d4926e87c332bdecdd6a8caafa.png)
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2024-05-09 14:35:41
|
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【推荐2】已知二次函数
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时,y有最大值为10,则c的值为( )
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【推荐1】抛物线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
A.![]() | B.![]() |
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【推荐2】已知二次函数
的图象如图所示,分析下列四个结论:①abc<0;②b2-4ac>0;③
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbcf3f7721240b8d2161f8c66a0fcf9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/18201bf1-6c98-45fb-8859-52431dd6ff7d.png?resizew=141)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】如图所示,是二次函数
图象的一部分,其对称轴为
,且过点
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;②
;③
;④若
是抛物线上两点,则
.其中说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/12/4/3123745859395584/3129285545795584/STEM/50231d66160d43389708df627fffbb92.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbcf3f7721240b8d2161f8c66a0fcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9264eedfed6239633d22ba60e5688e.png)
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【推荐2】如图,抛物线y=ax2+bx+c的顶点为D(−1,2),与x轴的一个交点A在点(−3,0)和(−2,0)之间,其图象如图所示,以下结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974255442960384/2976452511653888/STEM/fec97de8-2218-4eee-9879-91619b49a241.png?resizew=189)
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A.![]() | B.![]() |
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