Question

2. Dacă A = {x€N| x ≤ 4}, calculaţi: A UN, ANN, A-N, N-A.​

Answer 1

$x\in\{0,1,2,3,4\}\\\\A∪\mathbb{N}=\mathbb{N} \\ A∩\mathbb{N}=\{0,1,2,3,4\}\\A-\mathbb{N}=Ø \\ \mathbb{N}-A=\{5,6,7,8,....\}$