Question

Fie multimea M={ -2 ; $\frac{1}{2}$ ; 1,(3); -5 ; 4 ; 0 ; +3 } . Determinati elementele multimilor :
A = { x|x ∈ M si x ∈ N } = .....
B = { x|x ∈ M si x ∈ Z - N } = .....
C = { x|x ∈ M si x ∈ Q+ } = .....
D = { x|x ∈ M si x ∈ Q+ - N } = .....

Answer 1

   
[tex]M = \{-2;~ \frac{1}{2} ;~1,(3);~-5;~4;~0;~3\} \\ \\ A= \{4;~0;~3\} \\ \\ B= \{-2;~-5;\} \\ \\ C=\{\frac{1}{2} ;~1,(3);~4;~0;~3\} \\ \\ D=\{\frac{1}{2} ;~1,(3)\} [/tex]