二次函数
的图像如图所示,若关于
的一元二次方程
(
为实数)的解满足
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aff32c80bc21cfeb8b523e893abaf3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162b748bc38f4cdd59f1bfbf4fe3a42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd98122274c7a3b2767906627721c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/40f36d48-d389-4b2c-aa89-3a8d4caa848e.png?resizew=124)
A.![]() | B.![]() | C.![]() | D.![]() |
23-24九年级上·江苏徐州·期中 查看更多[3]
江苏省徐州市睢宁县2023-2024学年九年级上学期期中数学试题(已下线)猜题05 二次函数(易考必刷56题12种题型专项训练)-2023-2024学年九年级数学上学期期末考点大串讲(苏科版)湖北省武汉市汉阳区武汉市第三寄宿中学2023-2024学年九年级上学期月考数学试题
更新时间:2023-12-06 10:44:41
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【推荐1】二次函数y=ax2+bx+c(a≠0)的图象如图所示,对称轴为x=1,给出下列结论:①ac>0;②b2>4ac;③4a+2b+c>0;④3a+c>0.其中正确的有( )
![](https://img.xkw.com/dksih/QBM/2019/12/19/2358583387627520/2359311528173568/STEM/3a8bf8f2-0b33-407b-b355-396babb238eb.png?resizew=176)
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】已知当
且
为整数时,二次函数
随着
的增大而增大,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3288cc154a0946b1ebdc8605e7e16233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】抛物线
上部分点的对应值如下表:
从上表可知,下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![]() | … | ![]() | ![]() | 0 | 1 | 2 | … |
![]() | … | 0 | 4 | 6 | 6 | 4 | … |
从上表可知,下列说法中正确的是( )
A.抛物线与![]() ![]() | B.抛物线的对称轴是直线![]() |
C.函数![]() | D.在对称轴的左侧,![]() ![]() |
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【推荐2】设函数
的图象如图所示,它与
轴交于A、B两点,线段OA与OB的比为1∶3,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2019/2/28/2150507098800128/2154179994050560/STEM/083d260a8cd549ffbe29c056846afe4b.png?resizew=154)
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【推荐1】如图是二次函数
图象的一部分,图象过点
,与y轴交于点C,对称轴为
.给出五个结论:①
;②
;③
;④若点
,
为函数图象上的两点,则
;⑤若
,点P是抛物线对称轴上一点,则
周长的最小值为
,其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/fac9dd9e-0ba2-4be5-9d25-5b5265f2b777.png?resizew=109)
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【推荐2】抛物线
(a,b,c为常数,
)对称轴是直线
,抛物线与x轴相交于
,
两点,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
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