1) Вычислите: 1) \(\frac{8!}{10!}\); 2) \(\frac{12!}{9!\cdot3!}\); 3) \(\frac{15!-14!}{14!}\).

1. \(\frac{8!}{10!}=\frac{8!}{10\cdot9\cdot8!}=\frac{1}{90}.\)

2. \(\frac{12!}{9!\cdot3!}=\frac{10\cdot11\cdot12}{3\cdot2\cdot1}=220.\)

3. \(\frac{15!-14!}{14!}=\frac{14!(15-1)}{14!}=14.\)

Ответ: 1) \(\frac{1}{90}\); 2) 220; 3) 14.