“…For the general background of difference equations, one can refer to the monographs [1,2,3]. For the past twenty years, there has been much progress on the qualitative properties of difference equations, which included result in stability and attractive [13,15] and result in oscillation and other topics, see [1,2,3,8,9,10,12,21,22,23,24,25]. Therefore, it is worthwhile to explore this topic.…”