二次函数
为常数,
中的
与
的部分对应值如表:
当
时,给出下列四个结论:①
;②当
时,
的值随
值的增大而增大;③
;④当
时,关于
的一元二次方程
的解是
,
,其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0166102d801cc1bb81c15f4e212e91ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e489645a4930d59e21720c0c44ac318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52018c26122b8d881f2625bc873f82d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aff29c8a6b12deddb514c9e92d92c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4049b329e8cf711663e050e0dc9cdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4fd085ee10f340a008389c4a1a80d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-03-21 19:27:53
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】函数
与
在同一平面直角坐标系内图象大致是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33eb95e5d557d3fcfa52e48df1cdf183.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】抛物线
的对称轴为直线
,部分图像如图所示,下列结论中:
①
;②
;③
;④若点
,
均在抛物线上,则
;⑤
.其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540a408fa8e480416855df9647c27203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/506b1f439036e1bb0966bb97baaf094e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbdc6e14577fbcc8fd26ad13faff3c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14afef31dafd22343bcc789cafa5c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da24c8017a7adcba4079fabeaa7b7ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/3d44261c-a085-4fe1-868a-ede0a117cd84.png?resizew=122)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,二次函数 y=ax2+bx+c(a≠0)的图象与 x 轴交于 A、B 两点,与 y 轴交于点 C,且对称轴为直线 x=1, 点 B 的坐标为(-1,0).则下面的五个结论:①2a+b=0;②abc>0;③当 y<0 时,x<-1 或 x>2;④c<4b;⑤ a+b>m(am+b)(m≠1),其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2018/12/20/2100726008340480/null/STEM/f596176c63594e58b13d1ade7ff2ef80.png?resizew=171)
![](https://img.xkw.com/dksih/QBM/2018/12/20/2100726008340480/null/STEM/f596176c63594e58b13d1ade7ff2ef80.png?resizew=171)
A.2 个 | B.3个 | C.4 个 | D.5 个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】二次函数y=x2-(m-1)x+4的图像与x轴有且只有一个交点,则m的值为( )
A.1或-3 | B.5或-3 | C.-5或3 | D.以上都不对 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,抛物线
的对称轴是
,下列结论,正确的有( )
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
①
![](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/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次