先化简,再求值:(1﹣
)÷
,其中a=
+1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90524b8a8da58dcd8317d993f211acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31ef8cfc44e6b121e884a51023079d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
更新时间:2016-12-06 13:35:07
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解答题-计算题
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较易
(0.85)
【推荐1】先化简,再求值:
,从0,1,2,3这四个数中选择一个你认为适合的x代入求值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802f40d0353323f64d6070d71720d9a1.png)
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