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GAUSS NUMBERS OR TRIANGULAR NUMBERS
Triangular numbers are a sequence of numbers obtained by adding consecutive positive integers. The triangular number sequence begins as follows:
1, 3, 6, 10, 15, 21, 28, 36, 45, ...
Formula to calculate triangular numbers
The formula to calculate the nth triangular number is:
Tn = n(n + 1)/2
where n is a positive integer.
Properties of triangular numbers
Triangular numbers have several interesting properties:
1. _Addition of positive integers_: Triangular numbers are obtained by adding consecutive positive integers.
2. _Symmetry_: Triangular numbers have symmetry, that is, the triangular number Tn is equal to the triangular number T(n-1) + n.
3. _Relationship with square numbers_: Triangular numbers are related to square numbers, since the triangular number Tn is equal to the square number (n+1)^2 - (n+1).
4. _Appearance in nature_: Triangular numbers appear in nature in patterns and structures, such as in the arrangement of seeds in a sunflower flower.
Applications of triangular numbers
Triangular numbers have several applications in different fields:
1. _Mathematics_: Triangular numbers are used in number theory, geometry and combinatorics.
2. _Physics_: Triangular numbers are used in physics to describe the structure of crystals and the arrangement of particles in a system.
3. _Computer Science_: Triangular numbers are used in computer science to develop algorithms and data structures.
4. _Architecture_: Triangular numbers are used in architecture to design structures and buildings with harmonious patterns and proportions.
Example
Suppose we want to calculate the tenth triangular number. Using the formula Tn = n(n + 1)/2, we obtain:
T10 = 10(10 + 1)/2 = 55
Therefore, the tenth triangular number is 55.
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