Abstract
In this paper, we consider the functional equation of the form
▪ where
a, b, c are positive constants,
k, l are positive integers, function
P : I × I → R
+ = (0, ∞),
I ⊂ (0, ∞) is an unbounded set, τ, σ :
I → I, τ(
x) ≠
x, σ(
y) ≠
y, and lim
x→∞
τ(
x) = ∞, lim
y→∞
σ(
y) = ∞,
x, y ϵ
I. Some oscillation criteria of this equation are obtained.