已知函数
,若
,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3fd463c0a20cc30745dada448a46b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a73db674d29eae8f8921eff5944983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.-3,-1,1,3 | B.-1,3 | C.-3,1 | D.-1,1 |
更新时间:2019-11-05 09:04:49
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【知识点】 已知分段函数的值求参数或自变量解读
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解题方法
【推荐1】设
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c48b6240b5851a545c039d9cf07456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560796a8266607d08264772d36c45ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd5abf623a8a9b41f0314dd47e7c456.png)
A.14 | B.16 | C.2 | D.6 |
您最近一年使用:0次
【推荐2】已知函数
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3e00be715e0980b5ea96e8136ba5c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b5196dbfdde7d90e44eb5a5bcaee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6832243cee582e76407ab0d200df9a5.png)
A.![]() | B.6 | C.![]() | D.![]() |
您最近一年使用:0次