Question

Enumerati elementele multimii A = {x | x ∈ Z \ { -1 }, 3x+2/x+1 ∈ Z}

Ajutor urgent va roggg!!!

Answer 1

x+1 | 3x+2
x+1 | x+1 /•3 => x+1 | 3x+3

x+1 | 3x+3-3x-2
x+1 | 1
x+1 € divizorilor lui 1
x+1 € {-1; 1}
Dar x€Z-{-1} => x+1=1
x=1-1
x=0
A={0}