(1)![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817073605-17391.gif) 解:由①得 .··············································································· 2分 由②得 .··················································································· 4分
不等式组解集为 .·································································· 6分 (2)解:![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817073604-68735.gif)
························································································ 2分
.·············································································· 6分 |