已知
,且
,令
,则函数S的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08b920a5b3b89352c8728dba9cb1395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d51d94718abddea2d74e1cd161284c1.png)
更新时间:2024-03-09 13:58:50
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【知识点】 y=ax²+bx+c的最值解读
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