(1)解方程组
(2)解不等式(方程)组
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4f08572a5e7caae8229312f2d7b24f.png)
(2)解不等式(方程)组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fffa7528656c5402301b24d752d4ff6.png)
更新时间:2022-11-17 16:23:02
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐2】阅读探索:
解方程组
时,采用了一种“换元法”的解法,解法如下:
解:设
,
,原方程组可化为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5e71fc056d4bf812baaed9e55f65f1.png)
解得
即
解得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda0563279295c20155964ba0c1dae23.png)
根据上述材料,解决下列问题:
(1)运用换元法求关于a,b的方程组
的解;
(2)若关于x,y的方程组
的解为
求关于m,n的方程组
的解.
解方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e4bbb34bb258a3c319cfa8ea31535b.png)
解:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ef8aed876ccb0e67dd37e3107a1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf9008b1955faae2c19c1f047b7d475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5e71fc056d4bf812baaed9e55f65f1.png)
解得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20675d63e98453818d06959dab3772f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069476451ea588951c3b07e77ed61082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda0563279295c20155964ba0c1dae23.png)
根据上述材料,解决下列问题:
(1)运用换元法求关于a,b的方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216dee4eca2a26de663ec6e3a2922d6b.png)
(2)若关于x,y的方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bd6cdc598a67059dc4293a1694dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b5c180f1622aa95aeea67a31e71a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5483f9c6cf771f2c843f6b827cda00c9.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe238931bf3740938250b1146b74da1.png)
(2)解不等式组
,并把它的解集在数轴上表示出来
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe238931bf3740938250b1146b74da1.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1df5e62ed1b5bee4c752463b7b7adcf.png)
![](https://img.xkw.com/dksih/QBM/2019/6/6/2219959540547584/2223339969257472/STEM/04c044a9ac8043b78c3f19d9d6cc74d1.png?resizew=280)
您最近一年使用:0次