Question

Enumera elementele multimii:
B= { x e Z , 2k +3 supra k-2 , k e Z }
P.S :Z -multimea numerelor intregi
e - apartine

Answer 1

x=(2k+3)/(k-2)=[(2k-4)+7]/(k-2)=(2k-4)/((k-2)+7/(k-2)=2+7/(k-2)
2∈Z
7/(k-2)∈Z daca k-2∈D7
k-2∈{-7, -1,1,7}
k∈{-5,1,3,9}
x∈{1, -5, 9, 3}