Some problems on the global attractivity of linear nonautonomous difference equations

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This paper is to solve several problems on the global attractivity of the zero solution of the nonautonomous difference equation xn+1 - xn + Pnxn-kn = 0, n ∈ Z(0), where {Pn} is a sequence of nonnegative real numbers, and {kn} is a sequence of nonnegative integers with n - kn →∞ as n →∞.
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