计算:
(1)
;
(2)
.
(3)先化简,再求值:
,其中
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b545196697d6ab5548b7e54d51cb7c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ee1efc960a980b4ead2ba5f4c31f55.png)
(3)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5853f86d13ff5e559c504a1495557515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b624d88827e92e12bc0a8f1067cbe72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc64eaf4cd6737b000b28f1fcdd16c4b.png)
21-22六年级上·山东威海·期末 查看更多[4]
山东省威海市文登区2021-2022学年六年级上学期期末数学试题(已下线)专题06 整式的化简与求值 专项训练40题-2022-2023学年七年级数学上册重难题型全归纳及技巧提升专项精练(人教版)(已下线)专题07 整式的化简与求值 专项训练40题-2022-2023学年七年级数学上册重难题型全归纳及技巧提升专项精练(浙教版)(已下线)专题15 整式加减运算特训50道-【微专题】2022-2023学年七年级数学上册常考点微专题提分精练(人教版)
更新时间:2022-08-19 09:03:12
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解答题-问答题
|
适中
(0.65)
【推荐1】一般情况下,对于数
和
,
“
”不等号
,但是对于某些特殊的数
和
,
我们把这些特殊的数
和
,称为“理想数对”,记作
例如当
,
时,有
,那么
就是“理想数对”.
(1)
,
可以称为“理想数对”的是______;
(2)如果
是“理想数对”,求
的值;
(3)若
是“理想数对”,求
的值.
![](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/199109400b342f136fdede5cb78db290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.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/edbfa61c7b6b49287c9965a03d91facb.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/80a7049659aed11b01a3671d7b24c3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cca0ec4b4343a6ccd13b652aea1d00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049a4444804e1fbd8e80ba038be7b9cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf03e87dd5d82d30fd01be26cee1f27.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d79349ed755ccf1169f79a41338e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ca651bfc89628a3b05c6e87ce5d6f0.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f6eec2580e8b839a19f698def83b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea477bd55eca2791ae3f2e62d71a0621.png)
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解答题-计算题
|
适中
(0.65)
【推荐2】先化简,再求值:6(x2﹣2xy﹣y2)﹣4(x2﹣3xy﹣y2),其中 x=﹣
,y=﹣2.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次