Question

Ma puteti ajuta va rog? Este urgent!​

Answer 1

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)