5. Вычислите: \frac{P_4}{P_8}

Предмет: Математика $$P_4 = 4! = 4 \times 3 \times 2 \times 1 = 24$$ $$P_8 = 8! = 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 40320$$ $$\frac{P_4}{P_8} = \frac{24}{40320} = \frac{1}{1680}$$ Ответ: $$\frac{1}{1680}$$