抛物线
经过点
,且对称轴为直线
,其部分图象如图所示,下面结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f4a86740-0b3a-433c-b36e-b5b49b98a8fd.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f4a86740-0b3a-433c-b36e-b5b49b98a8fd.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-11-16 18:21:30
|
相似题推荐
单选题
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(0.85)
名校
【推荐1】已知二次函数
,当
时,x的取值范围是
,下列结论:①对称轴是直线
;②
;③二次函数的图象经过点
,
,若
,则
;④y有最大值
,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410c31228a2cae02fdaa677e72edc54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d068207eefa8d9fa53734d05c858590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1780b85e75213bba4f8f9bf33427613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14afef31dafd22343bcc789cafa5c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1663c9dbac392413128c4c78c18a5fcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94c936d84f8ca3921e7cb03230012dd.png)
A.①② | B.②③ | C.③④ | D.①④ |
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【推荐2】如图,抛物线
)经过点
.下面四个结论中:①
;②
;③
;④关于x的方程
有两个不相等的实数根.其中所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/86b7ac1a-1254-421b-9ad8-6bf613c18bf4.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b3c94d505e7c5bcce94afec4af3d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0949ce24c868813dfba767b6fb277538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad29acf28ab96fb1604e80c743bd738f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6969fbdabed37f1547f5590bf2afdcc5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/86b7ac1a-1254-421b-9ad8-6bf613c18bf4.png?resizew=159)
A.①② | B.②③ | C.③④ | D.②③④ |
您最近一年使用:0次
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【推荐1】已知二次函数
的图象如图所示,在下列5个结论:①
;②
;③
;④
;⑤
的实数).其中正确结论个数有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/6aeb9cb1-0f10-4a73-8279-01c8d68a5802.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209045c57c031f69d05333c968694a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad29acf28ab96fb1604e80c743bd738f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f89938c2f0a77fdecbc1b7d166a93ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b7c2ac7d54465951baeabdaddf95e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/6aeb9cb1-0f10-4a73-8279-01c8d68a5802.png?resizew=185)
A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐2】如图,抛物线
与x轴相交于点
,
,与y轴相交于点C,甲、乙、丙、丁四名同学在一起探究该函数的图象与性质,下面是他们得出的结论,其中正确的个数是( )
甲:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df34b74c3d2f07cb7f46f5d8e0661273.png)
乙:当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e152bef293bc745aee921dbdf179e9d8.png)
丙:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9306f28da27f08535353f2223079fd.png)
丁:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c474524987487e37b0f92f1452a46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774480361088aa3198c7bc3148fa23fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6599dca00d417b77f8bbdcadca9af81.png)
甲:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df34b74c3d2f07cb7f46f5d8e0661273.png)
乙:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e152bef293bc745aee921dbdf179e9d8.png)
丙:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9306f28da27f08535353f2223079fd.png)
丁:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c474524987487e37b0f92f1452a46c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/18/3c8b7a85-798f-448e-b808-98de3c6eb0d8.png?resizew=199)
A.1 | B.2 | C.3 | D.4 |
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