Question

Se considera multimea B={x(apartine)Z astfel incat x-2/x+2 (apartine) Z}

Answer 1

x-2/x+2 ∈ Z ⇒ x+2 | x-2
                          x+2 | x+2
x+2 | (x-2) - (x+2)⇒ x+2 | -4
⇒x+2 ∈ D(-4)= {-4 , -2 , -1 ,1, 2,4}