如图为二次函数
(
)的图象,则下列说法:①
;②
;③
;④当
时,
.其中正确的个数为( )
![](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/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e7ef804eeb23618fbf91ead47587f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
A.1 | B.2 | C.3 | D.4 |
更新时间:2023-02-13 16:41:03
|
【知识点】 根据二次函数的图象判断式子符号解读
相似题推荐
单选题
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较易
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【推荐1】二次函数
图象如图.下列结论:①
;②
;③若m为任意实数,则有
;④若
,且
,则
;其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd2336e50c0afb3e8e73a6ea9070ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8f1b58ebcb6caea25fea71bfbccd1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4deee559d44a0d1c1016b2053539f2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419504736c4934f6e0df4114c3743944.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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单选题
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较易
(0.85)
【推荐2】已知二次函数y=ax2+bx+c(a≠0)的图象如图所示,给出以下结论:
①a+b+c<0;②a-b+c<0;③b+2a<0;④abc>0.
其中所有正确结论的序号是( ).
![](https://img.xkw.com/dksih/QBM/2015/12/3/1573937961418752/1573937967906816/STEM/fc08d6046378455aa5981f6a7ab08622.png?resizew=132)
①a+b+c<0;②a-b+c<0;③b+2a<0;④abc>0.
其中所有正确结论的序号是( ).
![](https://img.xkw.com/dksih/QBM/2015/12/3/1573937961418752/1573937967906816/STEM/fc08d6046378455aa5981f6a7ab08622.png?resizew=132)
A.②③ | B.①② | C.③④ | D.①④ |
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