Multimea A:
x|45 =>x∈{1,3,5,9,15,45}
dar 3|x =>x∈{3,9,45}=>A={3,9,45}(3 elemete)
Multimea B:
x∈D6=>x∈{1,2,3,6}
x∈D8=>x∈{1,2,4,8}
=>x∈{1,2}⇔B={1,2}(2 elemete)
Multimea C:
x²∈M4=>x²∈{1,2,4}⇒x∈{1,2}
(x+3)|36⇒x+3∈{1,2,3,4,6,9,12,18,36}⇒x∈{0,1,3,6,9,15,33}
⇒x∈{1}⇒C={1}(1 elemet)
