如图,抛物线
的图像与
轴相交于
、
两点,与
轴相交于点
,以下结论:①
;②
;③当
时,
;④
.正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2375a27ead9549550676d4e6a2b47243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1dae05f42110fde12a61fca98bc408.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/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e152bef293bc745aee921dbdf179e9d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
A.4 | B.3 | C.2 | D.1 |
2024·湖南永州·一模 查看更多[2]
更新时间:2024-03-29 23:13:16
|
【知识点】 根据二次函数的图象判断式子符号解读
相似题推荐
单选题
|
较易
(0.85)
【推荐1】已知某二次函数y=ax2+bx+c(a≠0)的部分图象如图所示,下列结论中正确的有( )
①abc<0;②a﹣b+c<0; ③a=
;④8a+c>0.
![](https://img.xkw.com/dksih/QBM/2020/11/13/2592102059081728/2596784412409856/STEM/cb02024649324e95866fd275de1ea013.png?resizew=122)
①abc<0;②a﹣b+c<0; ③a=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f4db2783cfb3264280de0d8fa5207d.png)
![](https://img.xkw.com/dksih/QBM/2020/11/13/2592102059081728/2596784412409856/STEM/cb02024649324e95866fd275de1ea013.png?resizew=122)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】已知二次函数
的图象如右图所示,对称轴为直线
,有下列结论:①
; ②
; ③
; ④当
时,y随x的增大而增大. 其中正确的有( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507e6b9a00d4fb19a94edfea061f82f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/e6bf29c4-7286-4d47-9f6a-fee5786d7f5c.png?resizew=98)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次