Fibonacci numbers in Fibonacci series often appear in front of our eyes-such as pinecones, pineapples, the arrangement of leaves, the number of petals of some flowers, golden rectangles, golden sections, equiangular spirals and so on.
Fibonacci series: refers to such a series: 0, 1, 1, 2, 3, 5, 8,12 1, ... Mathematically, Fibonacci series is defined recursively as follows: F0=0, f6544. =2, n∈N*), in other words, Fibonacci series starts from 0 and 1, and the terms of the following Fibonacci series are added by the first two numbers.
By analogy, you will find that the last number is equal to the sum of the first two numbers. The numbers in this series are called Fibonacci numbers. 2 is the third Fibonacci number. This series (also called series) is closely related to natural plants. The number of petals of almost all flowers comes from one number in this series: the square scales and bracts of pineapple peel form two groups of spirals with opposite directions, and their numbers must be the next two numbers in this series (such as left-handed 8 lines and right-handed 13 lines).
Fibonacci spiral, also known as "golden spiral", is a spiral curve drawn according to Fibonacci sequence. Its drawing method is: a rectangle composed of squares with Fibonacci numbers as sides, and then draw a 90-degree sector in the square, and the connected arcs are Fibonacci spirals.
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