抛物线
(
,
,
是常数,
)经过
,
,
三点,且
.下列四个结论:①
;②
;③当
时,若点
在该抛物线上,则
;④若关于
的一元二次方程
有两个相等的实数根,则
.其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29343388ca8b33dc98325e65382b38a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9c0002b13f6cae093cd9dc9f19941b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/758080793e3ca0b8166f840475434aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5941014ff7bbecaaf144bef528505e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45cf86650443d1b86c79b1e3edc7e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010c48f89ae74c8244e3a4a841bc773a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544530e1133b2924ccfbe691141a5641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106075af36f5fbb556ef0835fa3cd75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660f3532dad8eaae789d09552d1345c9.png)
A.①② | B.①③ | C.②③④ | D.①②④ |
更新时间:2024-04-06 16:56:26
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】二次函数
的图象(局部)如图所示,则下列四个判断中,错误的是( )
![](https://img.xkw.com/dksih/QBM/2021/10/3/2821615167774720/2821929539076096/STEM/1c206cf9-6217-4e18-afd8-c06648ccd5f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/2021/10/3/2821615167774720/2821929539076096/STEM/1c206cf9-6217-4e18-afd8-c06648ccd5f6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,抛物线
交x轴于
,
两点,则下列判断中,错误的 是( )
![](https://img.xkw.com/dksih/QBM/2022/3/31/2947963636342784/2953221255684096/STEM/a3329c3e-6b36-487b-a607-e0857a00b5a1.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://img.xkw.com/dksih/QBM/2022/3/31/2947963636342784/2953221255684096/STEM/a3329c3e-6b36-487b-a607-e0857a00b5a1.png?resizew=178)
A.图象的对称轴是直线![]() |
B.当![]() |
C.当![]() ![]() |
D.一元二次方程![]() ![]() |
您最近一年使用:0次
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名校
【推荐1】二次函数
图象的一部分如图所示,顶点坐标为
,与x轴的一个交点的坐标为
,给出以下结论:①
;②
;③若
、
为函数图象上的两点,则
;④当-3![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
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0时方程
有实数根,则t的取值范围是
,其中正确的结论的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/9087da8b-b78e-4a86-bc78-a00cf4da724b.png?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59bdeeea8ca6f2c5c49e4ed8b5338d0.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,二次函数
的图象与x轴交于A,B两点,与y轴正半轴交于点C,它的对称轴为直线
,则下列选项中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd69aebdafb31468eb13ce3b28a36e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
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A.![]() |
B.![]() |
C.![]() |
D.当![]() ![]() |
您最近一年使用:0次
单选题
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名校
【推荐1】如图所示,抛物线
的顶点为
,与x轴的交点A在点
和
之间,以下结论:①
;②
;③
;④
,其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097e8a6a6de675f44d3bef88bb37375c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079dd115a4b8cbc93918a853363786dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae28deb43063b00c3200496fbb2da2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e7ef804eeb23618fbf91ead47587f2.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图是二次函数
的部分图象,图象过点
,对称轴为
,给出下面五个结论:①
;②
;③
;④
;⑤若
,则
.其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/0aa47d0a-2da8-40d0-ac70-e0f53e2edbe3.png?resizew=163)
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A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
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适中
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【推荐1】抛物线y=x2+bx+1的图象与x轴只有一个公共点,则b等于
A.2 | B.–2 |
C.±2 | D.0 |
您最近一年使用:0次
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真题
名校
【推荐2】如图,在平面直角坐标系
中,O为坐标原点,抛物线
的对称轴为
,与x轴的一个交点位于
,
两点之间.下列结论:①
; ②
;③
; ④若
,
为方程
的两个根,则
.其中正确的有( )个.
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A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次