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In this paper we consider the following nth order nonlinear functional differential equation x<sup>n</sup>（t）+integral from n=1 to ∞p（t,ξ）f（x（t）,x[g（t,ξ）]）do（ξ）=0（n even,n≧2,b】a） （1） Oscillations of this equation are studied.We make the