Question

Fie multimile: A={x apartine N/ x < 5} si B={x apartine N/ 3 < sau egal x < sau egal 6} Calculati : AUB AnB, A/B , B/A

Answer 1

A={0,1,2,3,4}
B={3,4,5,6}
AUB={0,1,2,3,4,5,6}
AnB={3,4}
A/B={0,1,2}
B/A={5,6}

Answer 2

x<5⇒x∈{0,1,2,3,4}
3≤x≤6⇒ x∈{3,4,5,6}
A={0,1,2,3,4}
B={3,4,5,6}
A∪B={0,1,2,3,4,5,6}
A∩B={3,4}
A-B={0,1,2}
B-A={5,6}