• Lu, Weiran (Department of Mathematics China University of Petroleum) ;
  • Li, Qiuying (Department of Mathematics China University of Petroleum) ;
  • Yang, Chungchun (Department of Mathematics China University of Petroleum)
  • Received : 2011.11.09
  • Published : 2014.09.30


In this paper, we consider the differential equation $$F^{\prime}-Q_1=Re^{\alpha}(F-Q_2)$$, where $Q_1$ and $Q_2$ are polynomials with $Q_1Q_2{\neq}0$, R is a rational function and ${\alpha}$ is an entire function. We consider solutions of the form $F=f^n$, where f is an entire function and $n{\geq}2$ is an integer, and we prove that if f is a transcendental entire function, then $\frac{Q_1}{Q_2}$ is a polynomial and $f^{\prime}=\frac{Q_1}{nQ_2}f$. This theorem improves some known results and answers an open question raised in [16].


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