Cred ca ai vrut sa spui ] D=[1,3,9,27,81,243]
[tex]A=\{n\in \mathbb{N} | n\leq6 \}\\B=\{n\in \mathbb{N} | n=2k, \text{unde } k\in \mathbb{N}, k\leq 4 \}\\C=\{n\in \mathbb{N} | n=2k+1, \text{unde } k\in \mathbb{N}, k\leq 4 \}\\D=\{n\in \mathbb{N} | n=3^k, \text{unde } k\in \mathbb{N}, k\leq 5 \}[/tex]