Fibonacci sequence is very useful in mathematics, life and nature. The presentation of this sequence and the number of golden sections abound in nature, for example, the number of petals of lily is 3, that of plum is 5, that of delphinium is 8, that of marigold is 13, that of sunflower is 2 1 or 34, and that of daisy is 34, 55 and 89.

The recursive definition of Fibonacci sequence is as follows: F(0)=0, f (1) = 1, f (n) = f (n- 1)+f (n-2) (n ≥ 2, n ∈ N*. It is an infinite series and is often used in various fields of social life, such as the moving average system of stock market analysis. However, in fact, it also has important applications in life planning.