二次函数y=ax2+bx+c(a≠0)的图像如图所示,则下列结论中不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/736ed21d-02f0-431c-8d1b-3371306b70bb.png?resizew=233)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/736ed21d-02f0-431c-8d1b-3371306b70bb.png?resizew=233)
A.abc<0 | B.b=-4a | C.4a+2b≥m(am+b) | D.a-b+c>0 |
21-22九年级上·云南玉溪·期末 查看更多[5]
云南省玉溪市峨山彝族自治县2021-2022学年九年级上学期期末数学试题(已下线)第06讲 二次函数的图象与性质-【帮课堂】2022-2023学年九年级数学下册同步精品讲义(北师大版)(已下线)22.1.7 二次函数字母系数与图象的关系(分层练习)-2022-2023学年九年级数学上册同步精品课堂(人教版)安徽省蚌埠市第一实验学校2022-2023学年九年级上学期第一次月考数学试卷(已下线)2023年安徽省亳州市中考二模数学试题变式题6-10题
更新时间:2022-08-03 17:45:23
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【推荐1】已知点
,
在函数
(a<0)图象上,则
大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c579e8be5110cb5de4ba5832927fa7d.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知:二次函数
,以下对于此二次函数图象的描述中,正确的有( )个.
①对称轴为直线
;②当
时,
随
的增大而增大;
③图象经过点
;④当
时,函数图象经过两个象限.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2ca09bfa24b5b400c182c51ebc0f1e.png)
①对称轴为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
③图象经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55feb3cbcaf37c63b6ce1c5abece8af.png)
A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图,这是二次函数
的图象,则化简
的结果是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/74020616-5865-4733-9a2a-36a4401c48c7.png?resizew=153)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a5538ac47dcedfe71020efc83fdd39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/74020616-5865-4733-9a2a-36a4401c48c7.png?resizew=153)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】二次函数
的图象如图所示,其对称轴为直线
,与x轴的交点为
,其中
,有下列结论:①
;②
;③
;④当m为任意实数时,
;⑤
.其中,正确结论的序号是_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
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A.①②⑤ | B.①③⑤ | C.①③④ | D.①④⑤ |
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【推荐1】二次函数
的部分图象如图所示,图象过点
,对称轴为直线x=2,下列结论:①
;②
;③
;④若点
,点
,点
在该函数图象上,则
;⑤若方程
的两根分别为
和
,且
,则
.其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/8ec7e1a1-3f64-47aa-85c0-d350bd76bd39.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e8ebd1d7fc0e20a1de79ed02516e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7d5d8d6ab93e29a908706ecab7a795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dee1a2078c6bc9aec520ce6b95dee98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6784f358cd22ed0eaaa07f65366a21.png)
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A.2个 | B.3个 | C.4个 | D.5个 |
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【推荐2】如图,抛物线
与
轴交于点
,与
轴的交点
在点
与点
之间(不包括这两点),对称轴为直线
.有下列结论:①
;②
;③
;④若点
,
在抛物线上,则
.其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/2fbf36be-277b-4ee8-91bc-c14e487c66f3.png?resizew=155)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知二次函数
(m为常数),当自变量x的值满足
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A.0或3 | B.0或7 | C.3或4 | D.4或7 |
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【推荐2】向上发射一枚炮弹,经x秒后的高度为y米,且时间与高度关系为
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