函数f(x)=
+
的定义域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d482a7701eaed9f4a50b4295744a1c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e995383c89eb9d34d64f14385dc4a80.png)
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更新时间:2020-01-11 06:48:09
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单选题
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容易
(0.94)
解题方法
【推荐1】若集合
,则![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021753856/STEM/7aba3c22a9cb42e78dddc265df70417d.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021753856/STEM/bc10c5ef8b964c99a86bd5846c107b9c.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021753856/STEM/7aba3c22a9cb42e78dddc265df70417d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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