先化简,再求值:
,其中
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafabb857736d1023342d071ba092d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8c634f3fdefeaf8880d4bf203ff02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122026c3ffc9003f0e7e78681fadf733.png)
更新时间:2018-11-14 21:36:22
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【知识点】 整式的加减中的化简求值解读
相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】给出定义如下:对于有理数对
,我们称使等式
成立的一对有理数
为“有趣数对”.
如:
,
,所以数对
,
都是“有趣数对”.
(1)有理数对
和
,其中是“有趣数对”的为______;
(2)若
是“有趣数对”,求
的值;
(3)若
是“有趣数对”,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec2e2c1587232f2c13fd661be7125bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d03f86a4703c1e11eca6ca656180d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5938af6ad00d65262cc11deca64d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c6107b473ca231e063095569942a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3f8d977386dbf377de247a80ce21da.png)
(1)有理数对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d03268e486f9fb09a44eca7d8ff7a9b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ebf13732505ee7982207046851aa59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3178bfc2a1f893d6c166209d015638b6.png)
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