Вычислите: 12!/9!, 30!/29!2!, 15!/2!16!, 14!/12!, 36!/2!34!, 25!/23!5!

a) \( \frac{12!}{9!} = 12 × 11 × 10 = 1320 \). b) \( \frac{30!}{29!2!} = 30 × \frac{1}{2} = 15 \). c) \( \frac{15!}{2!16!} = \frac{15 × 14}{2} = 105 \). d) \( \frac{14!}{12!} = 14 × 13 = 182 \). e) \( \frac{36!}{2!34!} = \frac{36 × 35}{2} = 630 \). f) \( \frac{25!}{23!5!} = \frac{25 × 24}{5 × 4 × 3 × 2 × 1} = 10 \). Ответы: 1320, 15, 105, 182, 630, 10.