Обьясните пожалуйста кто нибудь, как этот факториал делать. Никак не понимаю (
[tex] \frac{9factorial \times5factorial }{8factorial \times 6factorial} [/tex]
factorial - !
[tex] \frac{9factorial \times5factorial }{8factorial \times 6factorial} [/tex]
factorial - !
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[tex] \frac{9! \times 5 !}{8! \times 6!} = \frac{2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 9 \times 2 \times 3 \times 4 \times 5}{2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 2 \times 3 \times 4 \times 5 \times 6} = \\ = \frac{9}{6} = \frac{3}{2} = 1 \frac{1}{2} = 1.5[/tex]