解下列不等式组,(1) 1x+31>4 (2) |1-2x|≤2 (3) |1/2x+1|≥1(4) |x-2|
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解下列不等式组,(1) 1x+31>4 (2) |1-2x|≤2 (3) |1/2x+1|≥1(4) |x-2|
解下列不等式组,
(1) 1x+31>4 (2) |1-2x|≤2 (3) |1/2x+1|≥1
(4) |x-2|
解下列不等式组,(1) 1x+31>4 (2) |1-2x|≤2 (3) |1/2x+1|≥1(4) |x-2|
(1)|x+3|>4
x+3>4,或x+31,或x
(1)|x+3|>4
x+3>4,或x+3<-4
x>1,或x<-7
(2) |1-2x|≤2
-2≤1-2x≤2
-3≤-2x≤1
-1/2≤x≤3/2
(3) |1/2x+1|≥1
1/2x+1≥1,或1/2x+1≤-1
x≥0,或x≤-4
(4)|x-2|<4
-4
(1) |x+3|>4
当x+3>4,x>1
当x+3<-4,x<-7
∴x>1或x<-7
(2) |1-2x|≤2
1-2x ≤2,x≥-1/2
1-2x≥-2,x≤3/2
∴-1/2≤x3/2
(3) |1/2x...
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(1) |x+3|>4
当x+3>4,x>1
当x+3<-4,x<-7
∴x>1或x<-7
(2) |1-2x|≤2
1-2x ≤2,x≥-1/2
1-2x≥-2,x≤3/2
∴-1/2≤x3/2
(3) |1/2x+1|≥1
1/2x+1≥1,x≥0
1/2x+1≤-1,x≤-4
∴x≥0或x≤-4
(4) |x-2|<4
x-2<4,x<6
x-2>-4,x>-2
∴-2
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