更新时间:2018-02-08 10:53:18
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【推荐1】已知多项式
.
(1)若
,求
的值.
(2)若
的值与
的值无关,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7e8f8c49f22b348b870e883788bbc5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cb79083b25aaf15f54b0c958cf079e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c8573cf2fff14ab3c22a56536d8e1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c8573cf2fff14ab3c22a56536d8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】用“
”定义一种新运算:对于任意有理
,
,规定:
,例如:
.
(1)求
的值;
(2)试说明
的值与
的取值无关;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.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/4c370c332173fc820455b07d40fb180b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c3a72098ff6f585a953081f9effbf1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9358aca07e4e3afbc42b91a512dcd36c.png)
(2)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40adf7cfb300bee08d4418331cb810af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc3d0acd82b2f03708799a0ac432843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解答题-计算题
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【推荐1】嘉嘉和琪琪用下图中的A、B、C三张带有运算的卡片做一个“我说你算”的数学游戏,两人约定:一人说数字,并将卡片任意排列;另一人按卡片排列顺序进行计算.例如,嘉嘉说出数字2,并将卡片按
的顺序排列,则琪琪的运算顺序为:先对2进行
的运算,接着用求得的和
,最后用所求得的积
.列式为:
.
,并将卡片按
的顺序排列,请你帮琪琪列式并计算结果;
(2)嘉嘉说数字x,琪琪对x按
的顺序运算后,得到的数恰好等于12,求x.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67cd0fdd5daf3290a9824c7efa1f58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc581b6e2695e647025136fdefde94dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1964dab0221d0173bdb318e9fd3ed489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2410ff5236b24ff24f2cb54c8e733f5f.png)
(2)嘉嘉说数字x,琪琪对x按
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a6be08c747b22834f1425c6253eebc.png)
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【推荐2】解方程:(1)2(x+8)=3(x-1)
(2)
-
=1
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90733406f28d84e625028135006d1b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c76b1887f88b3babeee9cb04f30843.png)
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