Abstract. In this paper we study asymptotic behavior of
solutions of second
order neutral functional differential equation of the form
We present conditions under which all nonoscillatory solutions
are asymptotic to $at+b$ as $t\to\infty$, with $a,b\in R$. The obtained results extend those that are known for equation
AMSclassification. 34K10, 34K25.
Keywords. Neutral equation, asymptotic behavior.