如图,二次函数
的图象与
轴正半轴相交于
两点,与
轴相交于点
,对称轴为直线
,且
,则下列结论:①
;②
;③
;④关于
的方程
有一个根为
.其中说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/c87ea609-15e6-47f2-ab92-4030c6b261b0.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450203f4133388c2ae1ea8717514a50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a336747aef433bd2df55bc1d53dd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3f3db6b7c682450309a6ccba5ac5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac2a2dbdec1e7130ee3726004108b39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/c87ea609-15e6-47f2-ab92-4030c6b261b0.png?resizew=177)
A.①②④ | B.①③ | C.①③④ | D.②③ |
更新时间:2024-01-09 22:39:49
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名校
【推荐1】已知二次函数y=ax2+bx+c的图象如图所示,它与x轴的两个交点分别为(﹣1,0),(3,0).对于下列命题:①2a+b=0;②abc<0;③b2﹣4ac>0;④8a+c>0.其中正确的有( )
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【推荐2】如图,抛物线
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【推荐1】已知抛物线
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【推荐1】二次函数y=ax2+bx+c(a≠0)的图象如图,给出下列四个结论:①4ac<b2;②2a-b<0;③4a+c>2b;④3b+2c<0;⑤m(am+b)<a-b(m≠﹣1),其中正确结论的个数是( )
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【推荐2】已知二次函数y=ax2+bx+c的部分图象如图所示,则关于x的一元二次方程ax2+bx+c=0的解为( )
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