Question

sa se determine multimea ={xEZ / x+2 | 3}

Answer 1

$A = \Big\{x\in \mathbb_{Z} \Big| (x+2) | 3\Big\} \\ \\ (x+2) | 3 \Rightarrow (x+2)\in D_{3} \Rightarrow (x+2)\in \Big\{\pm1, \pm3 \Big\} \Rightarrow \\ \\ \Rightarrow (x+2)\in \Big\{-3,-1,1,3\Big\}\Big| -2 \Rightarrow x \in \Big\{-5,-3,-1,1\Big\} \Rightarrow \\ \\ \Rightarrow \boxed{A = \Big\{-5,-3,-1,1\Big\}}$