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In this paper, Oscillatory and asymptotic behaviour of solutions of a class of nonlinear fourth order neutral differential equations with positive and negative coefficients of the form (H) (r(t)(y(t) + p(t)y(t − τ))) + q(t)G(y(t − α)) − h(t)H(y(t − β)) = 0 and (NH) (r(t)(y(t) + p(t)y(t − τ))) + q(t)G(y(t − α)) − h(t)H(y(t − β)) = f (t) are studied under the(More)
In this paper, the authors study oscillatory and asymptotic behavior of solutions of a class of nonlinear higher order neutral differential equations with positive and negative coefficients of the form (a(t)(b(t)(y(t) + p(t)y(σ (t))))) (n−2) + q(t)G(y(α(t))) − h(t)H(y(β (t))) = 0 (E) for n 3 , n is an odd integer, 0 p(t) p 1 < 1 and −1 < p 2 p(t) 0. The(More)