抛物线
的顶点为
,与x轴的一个交点A在点
和
之间,其部分图象如图,则以下结论:①
;②当
时,y随x增大而减小;③
;④若方程
没有实数根,则
;⑤
,中正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978442964271104/2980694708641792/STEM/56765a9a-2855-4e54-bf46-7c64efd54ee0.png?resizew=153)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5552e592160034d418f2b4dee02dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95fcd639f88f4ff3199b584c2988e052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09872be2fce54e922259bde2c540bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9deb79d044a379f31a8fc57736d7ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2632fdb2c5dc8e65d5d44f4861f0cc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bda892497cea43df67db57b4e2a07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a395a7795e783b4596bef9775d02ed6f.png)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978442964271104/2980694708641792/STEM/56765a9a-2855-4e54-bf46-7c64efd54ee0.png?resizew=153)
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2022-05-16 16:21:49
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】若二次函数
的最小值为
,则关于x方程
的实数根的情况是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c22804f52986009170586c673342d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fc1387e43265ca57f0a3b4faeea2b7.png)
A.有两个相等实根 | B.有两个不等实根 | C.有两个实根 | D.没有实根 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知抛物线
与x轴交于C、D两点(C在D的左侧),当
时,点C的横坐标最小值为
,则点D的横坐标最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b7715b2d0c22978ee120742328bd8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5480081890562e2914de7e1386886ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
A.﹣3 | B.1 | C.5 | D.8 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】如图是二次函数y=ax2+bx+c图象的一部分,其对称轴是直线x=﹣1,且过点(﹣3,0),下列说法:①abc<0;②2a﹣b=0;③4a+2b+c<0;④若(﹣5,y1),(
,y2)是抛物线上两点,则y1<y2,其中说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/f99479aa-6077-4a9b-b8ab-737fadb0947e.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9658fb1429b9378cdeb5316778391c48.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/f99479aa-6077-4a9b-b8ab-737fadb0947e.png?resizew=185)
A.①② | B.②③ | C.①②④ | D.②③④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】二次函数
的图象如图所示,则一次函数
的图象不经过( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5046dd3f5af75fc85a690993a5e736f4.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】二次函数y=ax2+bx+c的图像如图所示,则①abc;②b2-4ac;③2a+b;④a+b+c这四个式子中,值为负数的有个
![](https://img.xkw.com/dksih/QBM/2016/2/17/1573971841753088/1573971847102464/STEM/c8cc2b7566544167b842652beca5078d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1573971841753088/1573971847102464/STEM/c8cc2b7566544167b842652beca5078d.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)
真题
【推荐2】已知二次函数
(a≠0)的图象如图所示,则下列结论:①b<0,c>0;②a+b+c<0;③方程的两根之和大于0;④a﹣b+c<0,其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2016/9/13/1574237618995200/1574237625384960/STEM/32eea7465ac744208d0328c21385a617.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1574237618995200/1574237625384960/STEM/32eea7465ac744208d0328c21385a617.png?resizew=146)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次