二次函数
的图象如图所示,其中顶点坐标为
,下列结论:①
;②
;③m为任意实数,则
;④
;⑤关于x的方程
有两个不相等的实数根.其中结论正确的个数有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/d8d06950-3ecf-434a-81c2-0b56c0029949.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5aeecf07df78bf0637bc71e2ababc61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c024a97cff31cb54b6026300808798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5d55b3906494569b9aef9e5afc059f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/d8d06950-3ecf-434a-81c2-0b56c0029949.png?resizew=159)
A.2个 | B.3个 | C.4个 | D.5个 |
更新时间:2023-01-27 16:39:31
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,已知二次函数
的图像与x轴交于点
,对称轴为直线
.结合图象分析下列结论:①
;②
;③
;④一元二次方程
的两根分别为
;⑤若
为方程
的两个根,则
且
.其中正确的结论个数是( )
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898669644013568/2899175008944128/STEM/9e95065c-cc16-4244-aa84-ef043dada2f7.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.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/50b8c9d41649449d34d8a23f0b8cda66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c98c2fc5fe2dd8f4f5ed2ab6efa99a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90bf45f18d95ba729ad9e53f03c5d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52618695d674b3c968184d50fcdcda80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b70aeff7c01e637f9caac346798ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8566fa6e6bede54cec42315a15a67e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa204d6b5183969f6da37f369eb7293d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029da2067b3564cee13879e402a89a01.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898669644013568/2899175008944128/STEM/9e95065c-cc16-4244-aa84-ef043dada2f7.png?resizew=169)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
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【推荐2】小明从如图所示的二次函数
的图象中,观察得出了下面四条信息:①
;②
;③
;④
;你认为其中正确信息的个数是( )
![](https://img.xkw.com/dksih/QBM/2020/2/23/2405075208929280/2405411104858112/STEM/27258ca2-2459-4a4f-80a4-ae0bef30d2c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6103edfd3657a1185363ba50a45ed43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ec22161a2713c74a45a6393a47a13c.png)
![](https://img.xkw.com/dksih/QBM/2020/2/23/2405075208929280/2405411104858112/STEM/27258ca2-2459-4a4f-80a4-ae0bef30d2c0.png)
A.4 | B.3 | C.2 | D.l |
您最近一年使用:0次
单选题
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适中
(0.65)
【推荐1】二次函数
,当
时,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d1595826d7875d71138b9297710c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a12a30935c79ae769818043a496f53.png)
A.有最大值1,有最小值-2 | B.有最大值2,有最小值-2 |
C.有最大值1,有最小值-1 | D.有最大值2,有最小值1 |
您最近一年使用:0次
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适中
(0.65)
【推荐2】下列为四个二次函数的图形,哪一个函数在
时有最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2600a54b7bf3f79aaec7d49a47f6b4d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ab9a34bc2e64faf57a28f9b00aec2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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名校
【推荐1】已知二次函数
,函数
与自变量
的部分对应值如下表:
则下列判断中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | … | —4 | —3 | —2 | —1 | 0 | … |
![]() | … | 3 | —2 | —5 | —6 | —5 | … |
则下列判断中正确的是( )
A.抛物线开口向下 | B.抛物线与![]() |
C.方程![]() | D.当![]() ![]() |
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【推荐2】二次函数
的图像与
轴有交点,
的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813d03ce8c4d7a452421c73ac77c4c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
【推荐1】已知二次函数
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若点
在该函数图象上,则
;⑤若方程
的两根为
和
,且
,则
.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e8ebd1d7fc0e20a1de79ed02516e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7d5d8d6ab93e29a908706ecab7a795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dee1a2078c6bc9aec520ce6b95dee98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107a5f148820bda905daff7a4b44129f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4557a97a17857a08aeb0a39489f10b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eddfb3da980fe08f11f74be158e32bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86affae0e4f6670ca6279152bd96b06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/17/eced62b0-0046-4543-9a3f-d5b0d58ce81e.png?resizew=120)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
单选题
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适中
(0.65)
【推荐2】如图,二次函数
的图象的对称轴是直线
,则以下四个结论中:①
,②
,③
,④
.正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30335ad79469438ba37de62e3e7096c4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ddd0026d7af1b90106d3e44b1b0fcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/8c8ef552-ff11-44fd-bbb5-cf91b18c48c2.png?resizew=179)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次