Question

Determinati multimea A={ x apartine N, 3 supra 2x+1 apartine N}​

Answer 1

x aparține N, => x poate fi 1,2,3,...

x=1 => 3/2 x 1 +1 =3/3 =1 => x=1 convine

x=2 => 3/2 x 2 +1=3/5 => x=2 nu convine

S={1}