Our aim in this paper is to obtain a necessary and sufficient condition characterized by coefficients and delays under which every solution of higher-order neutral equation will be oscillating, where p ≠ 0, τ > 0, σ> 0 and q are all constants.
In this paper, we consider the existence of bounded solution of functional differential equation of advanced type with nonlinear perturbation term form of undur the initial condition It is shown that if there exists the bounded solution of linear equation form of and certain condition bearing on the mapping H(t,x are satisfied, then there exists the bounded solution of equation (*) satistys initial condition(**).
