Copyright © 2010 Xiu-Mei Jia et al. This is an open access article distributed under the
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The main goal of the paper is to investigate boundedness, invariant intervals, semicycles, and global attractivity of all nonnegative solutions of the equation , , where the parameters , is an integer, and the initial conditions . It is shown that the unique positive equilibrium of the equation is globally asymptotically stable under the condition . The result partially solves the open problem proposed by Kulenović and Ladas in work (2002).