Question

Спростіть вираз:
1/n-1 + n-2/n^2-n

Answer 1

1/(n - 1) + (n - 2)/(n² - n) = 1/(n - 1) + (n - 2)/(n(n - 1)) =

= (n + (n - 2))/(n(n - 1)) = (2n - 2)/(n(n - 1)) = 2(n - 1)/n(n - 1)) =

= 2/n