Question

Scrieti urmatoarele multimi cu ajutorul unei proprietati caracteristice a elementelor: A=[0,1,2,3,4,5,6] B=[0,2,4,6,8] C=[1,3,5,7,9] D=[1,3,9,21,81,243]

Answer 1

Cred ca ai vrut sa spui ] D=[1,3,9,27,81,243]

$A=\{n\in \mathbb{N} | n\leq6 \}\\B=\{n\in \mathbb{N} | n=2k, \text{unde } k\in \mathbb{N}, k\leq 4 \}\\C=\{n\in \mathbb{N} | n=2k+1, \text{unde } k\in \mathbb{N}, k\leq 4 \}\\D=\{n\in \mathbb{N} | n=3^k, \text{unde } k\in \mathbb{N}, k\leq 5 \}$