Question

Aflați numarul natural n daca 8supra15 mai mic decât n supra 12mai mic decat7supra10

Answer 1

Răspuns:

$\frac{8}{15} < \frac{n}{12} < \frac{7}{10} \\ \frac{32}{60} < \frac{5n}{60} < \frac{42}{60} \\ 32 < 5n < 42 \\ \frac{32}{5} < n < \frac{42}{5} \\ 6.4 < n < 8.4 \\ n = 7$