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b) Determinați câte numere naturale n verifica relatia
[tex]2.4 \: < \frac{n}{10} < 5.7[/tex]
punct= virgula


Răspuns :


[tex]\it 2,4\ \textless \ \dfrac{n}{10}\ \textless \ 5,7|_{\cdot10} \Rightarrow 24\ \textless \ n\ \textless \ 57 \Rightarrow n\in\{25,\ 26,\ 27,\ ..., \ 56\} \Rightarrow \\ \\ \\ \Rightarrow 56-24=32 \ de \ numere[/tex]