Question

determinati n € pentru care numarul 3 supra 2n+1 este natural

Answer 1

3/(2n+1) ∈ N <=> 2n+1 = 1 ; 2n+1 = 3

2n+1 = 1 => 2n = 0 => n = 0

2n+1 = 3 => 2n = 2 => n = 1