Помогите пожалуйста,заранее спасибо) Сократить дробь:(n+1)!/n(n-2)!= 8 класс - №18862346

Помогите пожалуйста,заранее спасибо)
Сократить дробь:(n+1)!/n(n-2)!=
8 класс
- Предмет:
  Алгебра
- Автор:
  barbie
- 6 лет назад

Ответы 1

(1*2*3*....*(n-2)*(n-1)*n*(n+1))/(1*2*3*....*(n-2)*n)= (n-1)(n+1)=n^2-1
- Автор:
  mountaini8ib
- 6 лет назад
- 0
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