Question

Fie mulţimea
$A = \left[\begin{}{ \frac{1}{2} ; \sqrt{3} ; -2; \frac{1}{ \sqrt{5} }; 1,(25); 0,7; \frac{ \sqrt{7} } {2} \\\\\end{array}\right]$
Enumerati elementele multimii
B = { x Ι x ∈ A, x ∈ Q }

Answer 1

adica B este  multimea numerelor RATIONALE care se gasesc  in A


B={1/2;-2;1,(25) ;0,7}
as simple as that!!!!!!!!!!!!!