二次函数
的图象如图所示,下列说法中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/3ff1c51b-9c02-4851-bc87-30814a0c05cd.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/3ff1c51b-9c02-4851-bc87-30814a0c05cd.png?resizew=154)
A.当![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2023-10-30 10:20:46
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,二次函数
的图象经过点(
,0),对称轴为直线
,给出下列结论:①
;②
;③
;④
;⑤
.其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643631621414912/2645025259937792/STEM/b9019ea5-6c54-40e1-b5b2-5c535ba542b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792b38ddcda6319b1e453f552a4b4f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cbc6fbdb7a42c4f3f63ce6424e2eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe8b1f179885e1dc97818dd01f89ee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c016f2b7180f140aac7a74e0112b08c.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643631621414912/2645025259937792/STEM/b9019ea5-6c54-40e1-b5b2-5c535ba542b8.png)
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】二次函数
(
)的部分图象如图所示,图象过点
,对称轴为直线
.下列结论;①
;②
;③
;④当
时,y的值随x的增大而减小;⑤当m为任意实数时,
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6cff3d91d53041cc01e865e5bf51df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e8ebd1d7fc0e20a1de79ed02516e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1f6b465341f5c95610cb63c36af703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f91800665d772fa23d5168954fa0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f684fda4861820a7b02698f394daf3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/bcbdabc5-cef8-43b4-9484-916dacb88d37.png?resizew=156)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】已知二次函数
(
)的图象如图所示,给出以下结论:
①
;②
;③
;④关于x的一元二次方程
没有实数根;其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0af703742f068b38b79f6c1ba5ec9ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485599743ec05b9a68aa15997a7f8cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af32e76838f26797b6e6ff18cdc149f.png)
A.2 | B.3 | C.4 | D.1 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】二次函数
(
为常数,且
)中的x与y的部分对应值如下表:下列结论:①
;②当
时,y的值随x值的增大而减小.③方程
两根分别是
;④
,其中正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f2e8b5365c2f086a02e5dd3c3bd116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa90bcb0c6250c593d603599cc942c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f923f481b5b673dc35f34a0ec710dabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5b998c9460ba85a821126ff2b72d0b.png)
x | ![]() | 0 | 1 | 3 |
y | ![]() | 3 | 5 | 3 |
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次