(1)计算:(-1)2011+12-2sin60°+|-1|.(2)解不等式组x?3(x?2)≥41+2x3<x+1,并把它的解集在数轴上

2024-12-29 01:17:05
推荐回答(1个)
回答1:

(1)原式×=-1+2

3
-2×
3
2
+1
=-1+2
3
-
3
+1
=
3


(2)
x?3(x?2)≥4  ①
1+2x
3
<x+1   ②

由①得,x≤1,
由②得,x>-2,
∴原不等式组的解集是-2<x≤1,
如图: