In this paper, we consider the following second order retarded differential equations x″(t)+cx′(t)=qx(t-σ)-lx(t-δ) (1) x″(t)+p(t)x(t-τ)=0 (2) We give some
In this paper a class of the extended second derivative formulas is presented. Based on the extended k-step second derivative formula a new predictor-corrector