目的讨论广义Fibonacci函数F(a,x)的性质,并求出所有有理数r使得F(a,r)为正整数。方法利用初等方法以及Pell方程的性质。结果给出了所有可使F(a,x)是正整数的有理数r。结论获得了所有可使F(a,x)为正整数的有理数r的具体表示形式。
Aim Discussing the properties of the generalized Fibonacci function, and finding all rational number r such that F(a,r) is a positive integer. Methods Using the elementary method and the properties of the Pell's equation. Results All rational numbers r for which F( a, r) are positive integers have been given. Conclusion An exact expression of the rational number r is obtained for which F(a, r) is a positive integer.