给出定义如下:我们称使等式
成立的一对有理数
,
为“相伴有理数对”,记为
.如:
,
,所以数对
,
都是“相伴有理数对”.
(1)数对
,
中,是“相伴有理数对”的是 ___________;
(2)若
是“相伴有理数对”,则
的值是 ___________;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a88aa0824b26f6ba0b7c7491f5e8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472630cb9d24294eb39f2a08a63b3537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b915b2f3f2d86010b744c275cadc7e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bd20b79d6911da7aa5b2492dd0d39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87911933b034ab1c752e9001d797d2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2e5a172049e24be39119023786ebfb.png)
(1)数对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a18cab5a1bffbe14ab089d5d436a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1400d1ed9819228c2b71ce0018f4a8c4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66623ed264a67204032075cf549a18d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
2023七年级上·全国·专题练习 查看更多[1]
(已下线)专题2.5 整式求值的九大经典题型-2023-2024学年七年级数学上册举一反三系列(沪科版)
更新时间:2023-10-17 09:40:48
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