Question

Se dau multimile: A={x ∈ N / x < 5}, B = {x ∈ N* / x ≤ 3 }, C={x ∈ N / 2 ≤ x < 7}.Determinati multimile: A\B;A\C;B\A;B\C;C\A;C\B;A\Ø;Ø\B,(A\B)\C

Answer 1

A={4 3 2 1}
B={3 2 1}
C={6 5 4 3 2}

Answer 2

A={0, 1, 2, 3, 4};      
B={1, 2, 3};      
C={2, 3, 4, 5, 6}  
 
A\B={0, 4};   
A\C={0, 1};  
B\A=Ф;  
B\C={1};  
C\A={5, 6};  
C\B={4, 5, 6};  
A\Ф={0, 1, 2, 3, 4};  
Ф\B=Ф;  
(A\B)\C={0, 4}\C={0}