计算下列各式:
(1)解不等式
,并把它的解集在数轴上表示出来.
(2)解方程组:
.
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae8f2b449e76fc1692c984891c54a1b.png)
(2)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe8cbc15b750fefbee1b069a8bbb42c.png)
更新时间:2020-04-17 14:29:50
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解答题-问答题
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适中
(0.65)
【推荐1】(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fd6f76fb079df32bce30844f8cc9e3.png)
(2)解不等式
,并把它的解集在数轴上表示出来.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/c97ecbe7-e9cc-48f6-8c59-804efcdb007f.png?resizew=159)
(3)解方程组:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7ae50f76073ab0dcb970b22b69331c.png)
(4)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fd6f76fb079df32bce30844f8cc9e3.png)
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d742f38c5571a0f358994813f94bd6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/c97ecbe7-e9cc-48f6-8c59-804efcdb007f.png?resizew=159)
(3)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7ae50f76073ab0dcb970b22b69331c.png)
(4)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4e7d2501acd1f3e15409aa21b96ce6.png)
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解答题-作图题
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适中
(0.65)
【推荐2】解下列不等式:
(1)解不等式
,并把解集在数轴上表示出来.
的非正整数解.
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56efbe0e9d08f83d19dba0e51c195be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d1c2478ece6ba737c495256093a8c5.png)
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解答题-计算题
|
适中
(0.65)
【推荐2】若一元一次方程的解在一元一次不等式(组)解集范围内,我们则称该一元一次方程为该不等式组的“子方程”,这个解在数轴上对应的点称为该不等式的子点.
(1)方程①
;②
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
是不等式
的子方程有 (填序号).
(2)如图,
都是关于
的不等式组
的子点,求
的取值范围
的所有子方程的解中有且只有2个正整数,求
的取值范围.
(1)方程①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2996769f7df914b5c100a36e7426fd0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf0f18c67754af4b6cb1bc8da2bca44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d061402afba8890ac478b1157162958a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f502a69186fd2dcac3ca946bae7e11a1.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41c6cdc8b25d98ef3a49aca1aee5bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a63ff71f7b3ddfa1edcbd45a22051e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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