已知抛物线
和直线
,我们定义新函数M,若
,则
;若
,则
;若
,则
.下列结论:①无论k为何值,抛物线
与直线
总有交点;②若
,则当
时,M有最小值3;③若当
时,M的值随x的值增大而增大,则
;④当
时,方程
有三个不等实根.其中正确的结论是______ .(填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ddab22ef24a6a23ca73ce8db0be9cc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d155b9bf6d5e37d4b3bea6595baa0a4.png)
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2023·湖北武汉·模拟预测 查看更多[3]
2023年湖北省武汉市江汉区中考模拟数学试题(一)(已下线)专题03 二次函数的图像与性质(4类经典题型+优选提升)-【好题汇编】备战2023-2024学年九年级数学上学期期中真题分类汇编(人教版)17-二次函数综合题
更新时间:2023-08-06 10:09:01
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