某二次函数图象如图所示,下面各式判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/8784a08b-ec08-4716-a482-e519d7fbd2f9.png?resizew=106)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/8784a08b-ec08-4716-a482-e519d7fbd2f9.png?resizew=106)
A.![]() | B.![]() |
C.方程![]() | D.![]() |
更新时间:2023-12-28 17:08:36
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【推荐1】抛物线
上有三个点
,那么
的大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b271ca8a17cb6f885ce375342869097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4b625a6e7c54c579a19ac817cc6061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecbbe6557a18e4886e97f43daae44d0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】若A(﹣3,y1),B(﹣2,y2),C(2,y3)为二次函数y=(x+2)2+1的图象上的三点,则y1,y2,y3的大小关系是( )
A.y1<y2<y3 | B.y1<y3<y2 | C.y2<y1<y3 | D.y3<y1<y2 |
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【推荐1】如图,二次函数
的图象与
轴负半轴交于点
,对称轴为直线
.有以下结论:①
;②
;③若点
,
,
均在函数图象上,则
;④
;其中结论正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/5139cca4-8e0a-4cd3-9454-c4dc0659fbed.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b4a8bf16b31b2614c7b701f83d8257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e8d76541056c654248700280aa5b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e54901c25b2821c00f84d0af5a01d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c58547ffca537a4df6dd28a59bffe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93de10e0ef179d9030e453c9690bd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a974c370790a7422ae9c16566a7ce233.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/5139cca4-8e0a-4cd3-9454-c4dc0659fbed.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知二次函数=2++(≠0)的图象如图所示,在下列五个结论中:
①2-<0;②<0;③
;④-+>0; ⑤4+2+>0,错误的个数有
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868677120/STEM/9ab71746-3f12-4b3d-acb2-9b6801a685e1.png)
①2-<0;②<0;③
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868677120/STEM/77c589fc493d464cbd2d4e1b53f34153.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868677120/STEM/9ab71746-3f12-4b3d-acb2-9b6801a685e1.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】二次函数
(a≠0)的图象如图,下列结论:①c<0;②b>0;③4a+2b+c<0;④
,其中不正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/35974a86-659f-4fab-a049-db2fbd8997d6.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac8b0eb4aa1cbe23125aa2f6d35337c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bdb08d9513745c3a5981760973219a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/35974a86-659f-4fab-a049-db2fbd8997d6.png?resizew=159)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图是二次函数
图象的一部分,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
.其中说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712424680013824/2715458589720576/STEM/9bc1208c-9af0-430d-8295-04b80035b264.png)
![](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/c7fe6ba226b8f2abc07e5e6639495075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236acc508c112fe63854e5de2994ba35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712424680013824/2715458589720576/STEM/9bc1208c-9af0-430d-8295-04b80035b264.png)
A.①②③ | B.②③④ | C.①③④ | D.①②④ |
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【推荐1】已知直线y=x+m与抛物线
相交于两点,则实数m的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
A.m﹥![]() | B.m﹤![]() | C.m﹥![]() | D.m﹤![]() |
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【推荐2】下列四个函数中,图象的顶点在
轴上的函数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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