Convergence to non-autonomous differential equations of second order

In this paper, we consider a non-autonomous differential equation of second orderx″+m(t)f(x′)+n(t)g(x)=p(t,x,x′).x″+m(t)f(x′)+n(t)g(x)=p(t,x,x′).By the Lyapunov function approach, we discuss the convergence of solutions of the equation considered. Our findings generalize some earlier results in the literature.