已知x=2是方程
的解,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd457e6a6858571febdc0a1da7f5fcda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051e49b61bc016f00c4f3abd0132327e.png)
更新时间:2022-09-30 11:09:29
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【推荐1】(1)已知一个正数的两个平方根分别是
和
,求这个正数的平方根.
(2)若
与
互为相反数,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8314e2f98928b76d7fb74b09283f3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b8d3f7a166ff5db92d9ee0014a960d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cae7e8cb08f2769adfb9f577d08e696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e80264256e06f264e22532da4a61dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a9e63a945849b92ec92f226132a92c.png)
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【推荐2】观察下列三个等式:
,
,
,我们称使等式
成立的一对有理数a,b为“有趣数对”,记为
,例如数对
,
,
都是“有趣数对”,请回答下列问题:
(1)数对
是“有趣数对”吗?试说明理由.
(2)若
是“有趣数对”,求a的值.
(3)若
是“有趣数对”,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd843a0eb619adcfc3774b8342b42f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf82b6e45a603702cfc04fc74db2bc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235a7619c5333007f58939b578ce0eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97a0871c8e973ea26c6cb7ed738dae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043a66207c0a1deca0002429355b0418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3245c48c038d0bebe165b3394e45f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ece2594fb18edbc2858e26d34357204.png)
(1)数对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec4649fd7ee794021cadb075cbaf2c22.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39a3972a717d87144cb29dbf53d0aa2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42626d73e25ebb78ce52c804bf31937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9572bd8742a15f02829205025206f7.png)
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【推荐2】已知关于
的方程
与方程
的解相同.
(1)求这个相同的解.
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b97a4aca863d03463963ecb3339d121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d092d0f3252f1b5a0cfd654074cd8e.png)
(1)求这个相同的解.
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】我们定义:若整式M与N满足
(k为整数)则称M与N为关于的平衡整式.例如,若
,我们称
与
为关于4的平衡整式.
(1)若
与
为关于1的平衡整式,求a的值;
(2)若
与y为关于2的平衡整式,
与
为关于5的平衡整式,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa661fbaed7ff4fab8d4a5e0c66639c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8985948230b925a2fe4b6ead6edf64fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d2e5599453f8d4c04369bc8f79962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43557b716fa38a8aeca410d7c8ba1909.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ac393b0deb6124486b22a9e4c23cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6cc53c18bedaa8da6e179f16545b0c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d84378e6b166c0df1a006c33252793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e1725516933bb441200c903bfa1ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f65baa5af2b0201a9d1d59c20a03c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
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