Question

Determimati multimile A si B stiind ca satisfac simultan conditiile AuB {1,2,3,4,5,6,7} A intersects cu B {3,4}
A intersectat {5,6,7}=o taiat
{1,2} intersectat B =o taiat

Answer 1

AuB={1,2,3,4,5,6,7}
AnB={3,4}(inseamna ca 3 si 4 sunt si in multimea A si in multimea B )
An{5,6,7}=∅(inseamna ca 5,6 si 7 nu se afla in multimea A)
{1,2}nB=∅(inseamna ca 1 si 2 nu se afla in multimea B)
Deci multimile sunt:
A={1,2,3,4}
B={3,4,5,6,7}
:)