Question

Fie A=(x apartine N/3x+2 supra x-1 apartine n.Determinat multimea A

Answer 1

(3x-3+3+2)/(x-1)=3(x-1)/(x-1)+5/(x-1)=3+5/(x-1)
trebuie gasiti divizorii lui 5
D5={-5,-1,1,5}
x-1=-5
x=-4∉N
x-1=-1
x=0∈N
x-1=1
x=2∈N
x-1=5
x=4∈N
A={0,2,4}