如图,二次函数
的图象与x轴负半轴交于
,顶点坐标为
,有以下结论:①
;②
;③若点
,
,
,均在函数图象上,则
;④对于任意m都有
;⑤点M,N是抛物线与x轴的两个交点,若在x轴下方的抛物线上存在一点P,使得
,则a的范围为
.其中结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d27076ae11af23ba3fb930d98882db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5166b7552f2a409ad671716dfb7de53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da04f641c850a75a63031d5aed2e0625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f6f4baecf22e01bffb09de6521747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8248f8984dc73fb5b8ed39c57e32d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44cead90ae337fb61c932d93223481e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf6654ca641d9de5ff38d03190a2987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc672bfcc619ae5d071305e800a7640e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3835e6398d18d162afebc92cd2ae9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cbd5ef84ec1a62de738985bec99998.png)
A.5个 | B.4个 | C.3个 | D.2个 |
2024·新疆乌鲁木齐·一模 查看更多[3]
更新时间:2024-06-02 22:31:31
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【推荐1】如图,抛物线y=-x2+2x+m+1交x轴于点A(a,0)和B(b,0),交y轴于点C,抛物线的顶点为D,下列四个判断:①当x>0时,y>0;②若a=-1,则b=3;③抛物线上有两点P(x1,y1)和Q(x2,y2),若x1<1<x2,且x1+x2>2,则y1>y2;④点C关于抛物线对称轴的对称点为E,点G、F分别在x轴和y轴上,当m=2时,四边形EDGF周长的最小值为
,其中,判断正确的序号是( )
![](https://img.xkw.com/dksih/QBM/2019/11/2/2325257260556288/2327380125032448/STEM/c1760aaa5ad7401e9f4bef5848689cef.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53f134cd142e3b62e37cad0e7411e8d.png)
![](https://img.xkw.com/dksih/QBM/2019/11/2/2325257260556288/2327380125032448/STEM/c1760aaa5ad7401e9f4bef5848689cef.png?resizew=149)
A.①② | B.②③ | C.①③ | D.②③④ |
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【推荐2】如图,抛物线
过点
,对称轴是直线
.下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982866740420608/2984088573575168/STEM/aad2dc0a-ccc0-46ab-8840-e5ed28cad8e5.png?resizew=153)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982866740420608/2984088573575168/STEM/aad2dc0a-ccc0-46ab-8840-e5ed28cad8e5.png?resizew=153)
A.![]() |
B.![]() |
C.若关于x的方程![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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【推荐1】如图,抛物线
经过点
,
,
,若
,则下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/57d15bac-48af-4662-ade2-c4ca5c9fbfc5.png?resizew=203)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee74bec70d68998ec523fa5812760336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37461b15d3b31b5611c4f069207e921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ac55c5a8ad17e77e16e842af460186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/57d15bac-48af-4662-ade2-c4ca5c9fbfc5.png?resizew=203)
A.![]() | B.![]() |
C.![]() | D.点![]() |
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【推荐2】抛物线
交x轴于
,
,交y轴的负半轴于C,顶点为D.下列结论:①
;②
;③
;④当
是等边三角形时,抛物线解析式为
.其中正确的有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/70b7748a-c01a-464e-9ce5-6d47e68f09e4.png?resizew=154)
A.1 | B.2 | C.3 | D.4 |
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【推荐1】抛物线
过点
和点
,且顶点在第三象限,设
,则m的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd69aebdafb31468eb13ce3b28a36e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec40ff4479edca2ed18b6cadb8db72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b577575b3b58e89af3869ff5e764d0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知二次函数
的图象如图所示,有以下结论:①
;②
;③
;④
;⑤
.其中所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/8b52f61d-a1cd-447e-9fa8-9cebffb65a97.png?resizew=188)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/8b52f61d-a1cd-447e-9fa8-9cebffb65a97.png?resizew=188)
A.①② | B.①③④ | C.①②③④ | D.①②③④⑤ |
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