Question

Dterminati numarul natural n pentru care n+1 este divizor propriu al lui 12

Answer 1

n+1 | 12 => n+1 ∈ {2.3.4.6}

n+1=2=>n=1
n+1=3=>n=2
n+1=4=>n=3
n+1=6=>n=5

Answer 2

n+1 | 12 => n+1 ∈ {2.3.4.6}

n+1=2=>n=1
n+1=3=>n=2
n+1=4=>n=3
n+1=6=>n=5