Răspuns:
a) A∪B= (-9; 10)∪[-10; 9) = [-10; 10)
A∩B= (-9; 9)
b) A∪B = {-4; 3}∪(-4; 3) = [-4; 3]
A∩B = {-4; 3}∩(-4; 3) = ∅
c) A∪B = [tex][-\frac{3}{2}; 2][/tex]∪(-1; √5) = [tex][-\frac{3}{2};\sqrt{5})[/tex]
2 = √4
[tex]-\frac{3}{2}=-1\frac{1}{2}=>-\frac{3}{2}<-1[/tex]
A∩B = [tex][-\frac{3}{2}; 2][/tex]∩(-1; √5) = (-1; 2]
d) A∪B = (-∞; -√2]∪[-√3; 7) = (-∞; 7)
A∩B = (-∞; -√2]∩[-√3; 7) = ∅
