![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
更新时间:2019-09-03 06:48:41
|
相似题推荐
解答题-计算题
|
适中
(0.65)
名校
【推荐2】已知关于
,
的二元一次方程组
的解满足
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d338f3457372f6a02fadf0b80347d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1b24be6fb606863a3faca43c281063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】阅读理解:我们把
称为作二阶行列式,规定
= ad-bc,如
=2×5-3×4=-2,如果
的值小于 5,求出此时 x 的正整数解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5440a1b5d9338efd6976a56432e100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5440a1b5d9338efd6976a56432e100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b31e7d75e56b930c089d65eedee8f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81849563e7e59d3dd35b3545ce00eed4.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】【阅读感悟】
不等式
可等价转化为不等式线
或
,不等式
也可等价转化为不等式组
或
,我们把不等式
与
称为同解不等式.
【概念理解】
(1)下列属于同解不等式的是______;
①
与
;②
与
;③
与
;④
与
.
【问题解决】
(2)解不等式:
;
【拓展延伸】
(3)不等式
的解是______.
不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7f5172efd09e856cb2377784ffc04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e2e9d6b0e846de35ae0ee48847533e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1caa6de2770588cf5da2e52d26d37b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be75caef0c2b9fca543756394b0ae7ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e2e9d6b0e846de35ae0ee48847533e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1caa6de2770588cf5da2e52d26d37b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7f5172efd09e856cb2377784ffc04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be75caef0c2b9fca543756394b0ae7ac.png)
【概念理解】
(1)下列属于同解不等式的是______;
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab320b535af026b2005b8594a45f9797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dd02c26f8b0840919dd1d84db1fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9552c814744708381d7f1381273795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef77be6924677f4b3408b136f58f58c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd07d3095a73df425eb02b1ab3c250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5837c94260ccef846c336d3fcfe47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9552c814744708381d7f1381273795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86fe5e6506688b217d0824fc09e158f.png)
【问题解决】
(2)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299544388441d2ba1511da6f13c3b2a7.png)
【拓展延伸】
(3)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20441370502472ffe0799830e8a82588.png)
您最近一年使用:0次