下面是嘉淇作业中解题过程:
解方程组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22415915811d992f8c33c74d6318222a.png)
解:由
,得
③,第一步
,得
,即
,解得
.第二步
把
代入①,得
.第三步
所以这个方程组的解是
第四步
(1)已知嘉淇的解题过程是错误的,他开始出现错误的步骤是第________步;
(2)请给出正确的求解过程.
解方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22415915811d992f8c33c74d6318222a.png)
解:由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2e8e143bb6546f9d7f80dd9dfa3d0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b466aaf1a38864852e4bd0300c14aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb6a4ae9d62c5ca1ec4250a12388ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853eb29d6f48e309a1fdcc6c8c9b99c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60c19e6bade3905fc3f9518b2424ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de72a5190834f5dbe895596656c038b3.png)
把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de72a5190834f5dbe895596656c038b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e8ebd7c4463e7311f7ab4d7cd7d241.png)
所以这个方程组的解是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4d24730f65ba8039c51106c9fb9822.png)
(1)已知嘉淇的解题过程是错误的,他开始出现错误的步骤是第________步;
(2)请给出正确的求解过程.
更新时间:2024-03-28 16:34:31
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】对x,y定义一种新运算M,规定:
(其中m,n均为非零常数).例如:
,已知
,
.
(1)求m,n的值;
(2)若关于t的不等式组
恰好有3个整数解,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48266f6c39a0e9cff237ded4ecf43c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68563301e1a6255ab225fb1b28bf316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f6c35f94ba7427e1188bd72d13fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de80aefa0ae804dc00eb10e61abaa3f4.png)
(1)求m,n的值;
(2)若关于t的不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5036bcdb3be4ed76f4ec8d8f7b2e67c7.png)
您最近一年使用:0次