f(4-x)/f(4+x), если f(x)=∛ x(8-x) при lxl≠4

∛ (4-x)*(8-(4-x)) . . . ∛ (4-x)(8-4+x) ---------------------- = ----------------------- =∛ (4+x)(8-(4+x)) . . . ∛ (4+x)(8-4-x) . . . ∛ (4-x)(4+x) = ---------------------- =1. . . ∛ (4+x)(4-x)