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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Physics » Fibonacci sequence

Fibonacci sequence

This article includes the topics such as Fibonacci sequence, Fibonacci sequence diagram and Fibonacci sequence in nature and its applications.

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The Fibonacci numbers, typically abbreviated as Fn, are a mathematical series in which every number is the sum of the previous two. The series usually begins with 0 and 1, while some authors skip the first two terms and begin with 1 and 1 or 1 and 2. The following are the next several values in the sequence, starting with 0 and 1: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, and so on.

Pingala’s work on enumerating various patterns of Sanskrit poetry built from syllables of two lengths in 200 BC was the first to mention the Fibonacci numbers in Indian mathematics. They were called after Leonardo of Pisa, afterwards known as Fibonacci, an Italian mathematician who introduced the series to Western European mathematics in his book Liber Abaci, published in 1202.

Fibonacci numbers

A Fibonacci number is a sequence of numbers in which each number is the sum of the two numbers before it. Fibonacci numbers are a set of integers in mathematics where each number equals the sum of the two preceding numbers, starting with 0 and 1. xn+2=xn+xn+1 is the recurrence relation. The Fibonacci sequence is: 0,1,1,2,3,5,8,13,21,34,55,…,∞.

Fibonacci sequence and golden ratio

If the ratio of two quantities is the same as the ratio of their total to the bigger of the two quantities, they are said to be in the golden ratio in mathematics. The golden ratio is 1.618034 (roughly).

The Fibonacci sequence is frequently represented graphically in the form of the Fibonacci spiral. The area of the following number in the series is explained by each of the squares. By connecting the corners of the boxes, the Fibonacci spiral may be drawn inside the squares. Since the ratio between both the numbers in the Fibonacci sequence is very near to the golden ratio, which is roughly 1.618034, the squares fit together flawlessly. The ratio is closer to the golden ratio the larger the numbers in the Fibonacci sequence are. The Golden Rectangle is the name given to the spiral and the rectangle that results.

Fibonacci number calculation

 

fibonacci series1

The Golden Ratio and the Fibonacci Sequence are inextricably linked. We know that the Golden Ratio has a value of about 1.618034 and is represented by the symbol φ. The Golden ratio is closely related to the ratio formed by two consecutive Fibonacci numbers.

The Fibonacci numbers 5 and 8 are two examples of consecutive Fibonacci numbers. 85=1.6 is the ratio of 8 and 5.

Consider another set of numbers, such as 13 and 21, whose ratio is2113=1.6153.

It signifies that the ratio is very close to the Golden Ratio if the pair of Fibonacci numbers has a larger value. As a result, we can determine the Fibonacci numbers in the series using the Golden Ratio. xn=φ-1-φn5 is the formula for calculating Fibonacci numbers using the Golden Ratio.

Here is the Golden Ratio, which is approximately equal to 1.618, and n is the Fibonacci sequence’s nth term.

Properties of Fibonacci sequence

The Fibonacci numbers have the following properties:

  1. let us take any three consecutive numbers and add them together, we get the Fibonacci series. The third number is obtained by dividing the result by two. Take three consecutive integers, such as 2,3, and 5, and add them together, i.e., 2+3+5=10. When you divide 10 by 2, you get 5, that is the third number in a row.

  2. In the Fibonacci series, take four successive non-zero values. Multiply the outer number and the inner number together. When these two integers are subtracted, the difference is 1.

Take, for example, four consecutive integers like 2,3,5 and 8. Multiply the outer numbers, for example, 2 and 8 and the inside number, for example,3 and 5. Subtract these two figures, resulting in16-15=1. As a result, the difference is 1.

Applications of Fibonacci sequence

The Fibonacci sequence can be found in many different places, including nature, music, and the human body.

  • In music, it’s utilised to gather numbers and to create a beautiful proportion.

  • In a variety of domains of science, such as high-energy physics, quantum mechanics, and cryptography.

  • It is employed in programming (computer algorithms, interconnecting parallel, and distributed systems).

Conclusion

The Fibonacci sequence is a series of numbers that begins with a one or a zero and continues with a one, following the rule that each number (called a Fibonacci number) equals the sum of the two numbers before it.

faq

Frequently asked questions

Get answers to the most common queries related to the IIT JEE Examination Preparation.

What do you mean by Fibonacci sequence?

Answer: A Fibonacci number is a sequence of numbers in which each number is the sum of the two numbers before it. Fi...Read full

What do you mean by Golden ratio?

Answer: If the ratio of two quantities is the same as the ratio of their total to the bigger of the two quantities, ...Read full

State the properties of Fibonacci series.

Answer: The properties of Fibonacci series: ...Read full

State the applications of Fibonacci series.

Answer: The applications of Fibonacci series: ...Read full

State the first 10 Fibonacci numbers starting from 0.

Answer: The first 10 Fibonacci numbers are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34....Read full

Answer: A Fibonacci number is a sequence of numbers in which each number is the sum of the two numbers before it. Fibonacci numbers are a set of integers in mathematics where each number equals the sum of the two preceding numbers, starting with 0 and 1. xn+2=xn+xn+1 is the recurrence relation. The Fibonacci sequence is: 0,1,1,2,3,5,8,13,21,34,55,…,∞.

Answer: If the ratio of two quantities is the same as the ratio of their total to the bigger of the two quantities, they are said to be in the golden ratio in mathematics. The golden ratio is 1.618034 (roughly).

Answer: The properties of Fibonacci series:

  1. let us take any three consecutive numbers and add them together, we get the Fibonacci series. The third number is obtained by dividing the result by two. Take three consecutive integers, such as 2,3, and 5, and add them together, i.e., 2+3+5=10. When you divide 10 by 2, you get 5, that is the third number in a row.
  2. In the Fibonacci series, take four successive non-zero values. Multiply the outer number and the inner number together. When these two integers are subtracted, the difference is 1. Take, for example, four consecutive integers like 2,3,5 and 8. Multiply the outer numbers, for example, 2 and 8 and the inside number, for example,3 and 5. Subtract these two figures, resulting in16-15=1. As a result, the difference is 1.

Answer: The applications of Fibonacci series:

  • In music, it’s utilised to gather numbers and to create a beautiful proportion.
  • In a variety of domains of science, such as high-energy physics, quantum mechanics, and cryptography.
  • It is employed in programming (computer algorithms, interconnecting parallel, and distributed systems).

Answer: The first 10 Fibonacci numbers are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34.

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