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

Question

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

Answer 1

lim (x -> -1) (x^3-2*x-1)(x+1)/(x^4+4*x^2-5)= по правилу Лопиталя=

lim (x -> -1)(3х^2-2):(4x^3+8x)=(3*(-1)^2-2):(4*(-1)^3+8*(-1))=1/12