Câu 5: A\(\cap\) B=[-4;-2]\(\cap\) (3;7]
=∅
A\(\cup\) B=[-4;-2]\(\cup\) (3;7]
A\B=[-4;-2]\(3;7]
=[-4;-2]
B\A=(3;7]\[-4;-2]
=(3;7]
Câu 4: A\(\cap\) B=[-4;4]\(\cap\) [1;7]
=[1;4]
A\(\cup\) B=[-4;4]\(\cup\) [1;7]
=[-4;7]
A\B=[-4;4]\[1;7]
=[-4;1)
B\A=[1;7]\[-4;4]
=(4;7]
Câu 1:
a: A={x∈R|x>=1}
=>A=[1;+∞)
B={x∈R|x<=3}
=>B=(-∞;3]
A\(\cap\) B=[1;+∞)\(\cap\) (-∞;3]
=[1;3]
A\(\cup\) B=[1;+∞)\(\cup\) (-∞;3]
=(-∞;+∞)
b: A={x∈R|x<=1}
=>A=(-∞;1]
B={x∈R|x>=3}
=>B=[3;+∞)
A\(\cap\) B=(-∞;1]\(\cap\) [3;+∞)
=∅
A\(\cup\) B=(-∞;1]\(\cup\) [3;+∞)
Câu 2:
A=(-3;5]\(\cup\) [8;10]\(\cup\) (2;8)
=(-3;10]
B=[0;2]\(\cup\) (-∞;5]\(\cup\) (1;+∞)
=(-∞;+∞)
C=[-4;7]\(\cup\) (0;10)
=[-4;10)
D=(-∞;3]\(\cup\) (-5;+∞)
=(-∞;+∞)
E=(3;+∞)\(-∞;1]
=(3;+∞)
F=(1;3]\[0;4)
=∅
