考虑了高阶中立型微分方程dn/dtn[x(t)-p(t))(t-τ(t)]+m∑I=1Qi(t)fi(x(t-σi(t)))+k∑j=1 Rj(t)gj(x(t+θj(t)))=0在0≤p(t)＜1的......