Răspuns:
[tex]\bf n \in \{\bf 1,2,3,5\}[/tex]
Explicație pas cu pas:
Salutare!
12 are 6 divizori:
[tex]\bf D_{12}= \{1; 2; 3; 4; 6; 12\}[/tex]
Divizorii improprii sunt: 1; 12
Divizorii proprii sunt: 2; 3; 4; 6
n + 1 = ??
[tex]\bf n+1=2\implies n = 2-1\implies \boxed{\bf n=1}[/tex]
[tex]\bf n+1=3\implies n = 3-1\implies \boxed{\bf n=2}[/tex]
[tex]\bf n+1=4\implies n = 4-1\implies \boxed{\bf n=3}[/tex]
[tex]\bf n+1=6\implies n = 6-1\implies \boxed{\bf n=5}[/tex]
[tex]\bf n \in \{\bf 1,2,3,5\}[/tex]
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