Răspuns:
[tex]\it \overline{ab}\in{(93,\: 62,\: 31)}[/tex]
Explicație pas cu pas:
[tex]\it \overline{ab} = ?\\\\a,b - cifre\\\\a\neq 0\\\\a,b \in{(0,1,2,....,9)}\\\\a:b = 3\Rightarrow a=3 \cdot b \Rightarrow \boxed{\it a=3b}\\\\b = 1 \Rightarrow a = 3 \cdot 1\Rightarrow a=3 \Rightarrow \boxed{\it \overline{ab} =31} \\\\b =2 \Rightarrow a=3 \cdot 2\Rightarrow a=6 \Rightarrow \boxed{\it \overline{ab} =62}\\\\ b=3 \Rightarrow a=3 \cdot 3\Rightarrow a=9 \Rightarrow \boxed{\it \overline{ab} =93} \\\\b = 4 \Rightarrow a=3 \cdot 4\Rightarrow a=12 \Rightarrow nu\:convine,deoarece\: a\:este\:cifra[/tex]
Ordonate descrescator: 93, 62, 31
