Lim х→1 ((x^2-1)/(1-x)= Lim х→1 ((x-1)(x+1))/(1-x)=
Lim х→1 ( - (1-x)(x+1))/(1-x) = Lim х→1 (- (x + 1)) = -2
Lim х→1 ((x^2-1)/(1-x)= Lim х→1 ((x-1)(x+1))/(1-x)=
Lim х→1 ( - (1-x)(x+1))/(1-x) = Lim х→1 (- (x + 1)) = -2