Question

3!/4! - 4!/5! como fazerrrrr

Answer 1

              $\frac{3!}{4!} -\frac{4!}{5!} \\ \\ = \frac{3!}{4.3!} - \frac{4!}{5.4!} \\ \\ = \frac{1}{4} - \frac{1}{5} \\ \\ = \frac{5-4}{20} \\ \\ = \frac{1}{20}$