Question

Deter. Multimile A si B stiind ca sunt indeplinite simultan conditiile:
A ∪ B={1,2,3,4,5,6,7,8,9}
B \ A={4,5,6,7,8}
{3,9} ∩ B=∅
A ∩B={1}
Care sunt elementele multimii A si multimii B?
Urgent!!!! Multumesc!!!!

Answer 1

A={1,2,3,9}
B={1,4,5,6,7,8}
B-A={4,5,6,7,8}
{3,9}∩B=Ф
A∩B={1}