已知二次函数
,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
______ 时,
随
的增大而减小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111daa92913c960db32f536b74e64183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2023-10-15 19:24:02
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【知识点】 y=a(x-h)²+k的图象和性质解读