二次函数
的部分图像如图所示,对称轴为
,且经过点
,下列说法:①
;②
;③
;④若
、
是抛物线上的两点,则
;⑤
(其中
),正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa91ee69a42bd3b317335c8a0d7c9ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b524ed5ad41b8615edbac42b6d6174c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a08494d2f6a9113eec63f6373bd1bf43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacbaf20e1ad7210c72bedff4293f01d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309ca4fc406992e956d238d4e27fec14.png)
A.②③④ | B.①②⑤ | C.①③⑤ | D.①②④⑤ |
22-23九年级上·安徽合肥·阶段练习 查看更多[5]
安徽省合肥市长丰县城关中学2022-2023学年九年级上学期数学第二次月考测试题陕西省延安市延川县2022-2023学年九年级上学期期末数学试卷江西省南昌市外国语学校2022-2023学年九年级上学期期末数学试卷江西省南昌市外国语学校2022-2023学年九年级下学期开学考数学试题(已下线)专题07二次函数的图象与性质(2)(4个知识点2种题型1个易错点)-【帮课堂】2023-2024学年九年级数学下册同步学与练(北师大版)
更新时间:2022-12-15 13:56:12
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【推荐1】若二次函数y=ax2-2ax+c的图象经过点A(0,-1),B(-2,y1),C(3,y2),D(
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A.y1>y2>y3 | B.y1> y3> y2 | C.y2> y1>y3 | D.y3>y2> y1 |
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真题
【推荐2】设二次函数
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时,总有
,当
时,总有
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,已知二次函数
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;②
;③
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/f2c870d4-c232-4500-b4d8-0f085c266957.png?resizew=177)
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,抛物线
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,且对称轴为直线
,有下列结论①
;②
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/09555393-be87-4cd0-a161-da440dbe1355.png?resizew=116)
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A.①②③ | B.③④⑤ | C.②③④ | D.②④⑤ |
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【推荐1】如图,抛物线
的对称轴为直线
,与
轴的一个交点在
和
之间,其部分图象如图所示.则下列结论:①
;②
;③
;④
(
为实数);⑤点
,
,
是该抛物线上的点,则
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![](https://img.xkw.com/dksih/QBM/2020/5/6/2456906090520576/2457794230943744/STEM/687bc63e-1ac3-4c8b-9587-993a3f8fddd5.png?resizew=177)
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A.1 | B.2 | C.3 | D.4 |
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【推荐2】二次函数
图象如图,下列结论:
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当
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其中正确的有( )
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其中正确的有( )
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名校
【推荐2】已知关于x的二次函数y=x2+(2-a)x+5,当1≤x≤3时,y在x=1时取得最大值,则实数a的取值范围是( )
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