计算.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514b8388ec2a231fa0e16f649f63a3d4.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c501345e66f942c790e8624e81e4ff7f.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1166fb386161b7a13f6d3537c9afe892.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514b8388ec2a231fa0e16f649f63a3d4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c501345e66f942c790e8624e81e4ff7f.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1166fb386161b7a13f6d3537c9afe892.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dacfe44d5117e04e4351f7dae9b83f.png)
更新时间:2023-10-19 09:08:23
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相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】对于任意的有理数a、b,定义一种新的运算,规定:
,
,等式右边是通常的加法、减法运算,如
,
时,
,
.
(1)求
的值;
(2)若
,求x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954a5e12e1b9fa8185a1a36e8bcfe28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b74dc38551d829c19c4bc8c83d848a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425c96bedd1b1a8bb1925551d07f1dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b577d710b03274625a83befaf2b7abd6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fbbaf0823738ba038bfab162ae2a89.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b1e5eaf5cdbd2b3a835a7542a408d8.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】先阅读第(1)题的解法,再解答第(2)题:
(1)已知a,b是有理数,并且满足等式
,求a,b的值.
解:因为
,
所以
,
所以
,
解得
.
(2)已知x,y是有理数,并且满足等式
,求
的值.
(1)已知a,b是有理数,并且满足等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65057aede9d68d10988f041c5a61fdd3.png)
解:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65057aede9d68d10988f041c5a61fdd3.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc048c113d97a6b9ef0c41e32f0112d.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1df35cdabd2e1a0d4d9796d1db1d7c3.png)
解得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ac74dcb32544a4eda466108ccebbde.png)
(2)已知x,y是有理数,并且满足等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4c160faac60919e577e3a498d9e0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fc838e1477179b36ca7481ee2cc1e8.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】定义一种新运算“※”,其规则为
(等式右边的运算为平常的加、减、乘法运算).例如,
,
.
(1)根据规则计算
值为______;
(2)有理数的加法和乘法运算都满足交换律,“※”运算是否满足交换律?若满足,请说明理由;若不满足,请举例说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85acc6ad31b0df4ff22db7358dc91a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c53d0ad54dbaf2fd1fcf7e010ac9c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26af0d552c5ab2b4452b8a2efe692fde.png)
(1)根据规则计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9520adb1880497f29664a5783673b463.png)
(2)有理数的加法和乘法运算都满足交换律,“※”运算是否满足交换律?若满足,请说明理由;若不满足,请举例说明.
您最近一年使用:0次