lim x^2-4x-5/x^2-2x-3x-->-1

Ответ:

lim        x^2-4x-5/x^2-2x-3 = lim     ((х+1)(х-5)) /((х+1)(х-3)) = x-->-1                                    x-->-1

lim     (х-5)/(х-3) = (-1-5)/(-1-3) = (-6)/(-4) = 3/2 = 1,5x-->-1                                   

Источник: https://znanija.com/task/323682