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The main objective of this paper is to study the boundedness character, the periodicity character, the convergence and the global stability of positive solutions of the difference equation $$x_{n+1}=\frac{{\alpha }_0{x}_n+{\alpha }_1{x}_{n-l}+{\alpha }_2{x}_{n-k}}{{\beta }_0{x}_n+{\beta }_1{x}_{n-l}+{\beta }_2{x}_{n-k}},n=0,1,2,\cdots$$ where the coefficients ${\alpha }_i,{\beta }_i\in (0,\infty )$ for $i=0,1,2,$ and $l$, $k$ are positive integers. The initial conditions $x_{-k},\cdots ,x_{-l},\cdots ,x_{-1},x_0$ are arbitrary positive real numbers such that $l<k$. Some numerical experiments are presented.

The main objective of this paper is to study the boundedness character, the periodic character, the convergence and the global stability of positive solutions of the difference equation $$x_{n+1}=\left(A+\sum _{i=0}^k{\alpha }_i{x}_{n-i}\right)/\sum _{i=0}^k{\beta }_i{x}_{n-i},n=0,1,2,\cdots$$ where the coefficients $A$, ${\alpha }_i$, ${\beta }_i$ and the initial conditions $x_{-k},x_{-k+1},\cdots ,x_{-1},x_0$ are positive real numbers, while $k$ is a positive integer number.