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解题方法
1 . 有一道条件不完整的题目:“已知函数
则
_________.”已知该题目的答案是
,现有如下四个式子:①
;②
;③
;④
.则可以作为
时的解析式的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68d01434d1f47047c3afd885ec78dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff5246259cf4a08ad513436b7ed33ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba95e8580f2bf7b72d341c39c6d88f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2373e34bbdb6a6bc42472cdee9e5d534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0166048aeb5b6df13036cb84320a55c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd9be51fac59ed0ac89031374d29cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3155d1979c4c204170a587fb349c9c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
A.①④ | B.②③ | C.②③④ | D.①②③④ |
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