设
,不等式组
所表示的平面区域是
.给出下列三个结论:
①当
时,
的面积为3;
②
,使
是直角三角形区域;
③设点
,对于
有
≤4.
其中,所有正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be362dec96173f246ff747264007817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee3ce28491cd7f61d0b938f7815c0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559305e1e35d369f1d056bb4191a23aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
③设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0722a8196b81993cc70a14ae377d66c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3df23a820fe70243443876ef94b65b.png)
其中,所有正确结论的序号是
13-14高三·全国·课后作业 查看更多[3]
(已下线)2015高考数学理一轮配套特训:6-3二元一次不等式及简单的线性规划(已下线)《2018届优生-百日闯关系列》数学专题四 专题四第三关(已下线)专题5-2 线性规划综合应用 (讲+练)-2
更新时间:2016-12-03 02:21:06
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