题目内容
(1)计算:
(2)解不等式组
,并把它的解集表示在数轴上.

(2)解不等式组

(1) 8 ( 4分 )
(2) -1<x<2 ( 4分 )
(2) -1<x<2 ( 4分 )
(1)原式=4
+7-1=8
(2)解3x-1>-4得x>-1, 解2x<x+2得x<2,所以不等式组的解集为-1<x<2,


(2)解3x-1>-4得x>-1, 解2x<x+2得x<2,所以不等式组的解集为-1<x<2,

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