Examples of using Triangular numbers in English and their translations into Serbian
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Cyrillic
The first four triangular numbers.
The number of rectangles in a square grid is given by the squared triangular numbers.
All square triangular numbers are found from the recursion.
Alternating triangular numbers(1, 6, 15, 28,…) are also hexagonalnumbers.
The sum of the all triangular numbers up to the nth triangular number is the nth tetrahedral number, .
Wacław Franciszek Sierpiński posed the question as to the existence of four distinct triangular numbers in geometric progression.
There are infinitely many triangular numbers that are also square numbers; e.g., 1, 36.
German mathematician and scientist Carl Friedrich Gauss discovered that every positive integer is representable as a sum of at most three triangular numbers, writing in his diary his famous words,"EΥΡHKA!
The term can mean polygonal number a number represented as a discrete r-dimensional regular geometric pattern of r-dimensional balls such as a polygonal number(for r= 2) ora polyhedral number(for r= 3). a member of the subset of the sets above containing only triangular numbers, pyramidal numbers, and their analogs in other dimensions.
The difference of two positive triangular numbers is a trapezoidal number. .
The triangular numbers for n= 1, 2, 3,… are the result of the juxtaposition of the linear numbers(linear gnomons) for n= 1, 2, 3,…: These are the binomial coefficients( n+ 1 2){\displaystyle n+1\choose 2}.
A member of the subset of the sets above containing only triangular numbers, pyramidal numbers, and their analogs in other dimensions.[1].
Knowing the triangular numbers, one can reckon any centered polygonal number; the nth centered k-gonal number is obtained by the formula C k n= k T n- 1+ 1{\displaystyle Ck_{ n}= kT_{ n-1} +1} where T is a triangular number.
Later, it became a significant topic for Euler,who gave an explicit formula for all triangular numbers that are also perfect squares, among many other discoveries relating to figurate numbers. .
The infinite sequence of triangular numbers diverges to+∞, so by definition, the infinite series 1+ 2+ 3+ 4+⋯ also diverges to+∞.
German mathematician andscientist CarlFriedrichGauss discovered that every positive integer is representable as a sum of three triangular numbers(possibly including T0= 0), writing in his diary his famous words,"ΕΥΡΗΚΑ!
Note that this theorem does not imply that the triangular numbers are different(as in the case of 20= 10+ 10), nor that a solution with exactly three nonzero triangular numbers must exist.
The term figurate number is used by different writers for members of different sets of numbers, generalizing from triangular numbers to different shapes(polygonal numbers) and different dimensions(polyhedral numbers). .
Most simply, the sum of two consecutive triangular numbers is a square number, with the sum being the square of the difference between the two(and thus the difference of the two being the square root of the sum).
But the numbers in the next diagonal are called the triangular numbers because if you take that many dots, you can stack them into equilateral triangles.
A computer search for pentagonal square triangular numbers has yielded only the trivial value of 1, though a proof that there are no other such numbers has yet to be found.
A computer search for pentagonal square triangular numbers has yielded only the trivial value of 1, though a proof that there are no other such numbers has yet to appear in print.[3].
Another relationship involves the Pascal Triangle: Whereas the classical Pascal Triangle with sides(1,1)has diagonals with the natural numbers, triangular numbers, and tetrahedral numbers, generating the Fibonacci numbers as sums of samplings across diagonals, the sister Pascal with sides(2,1) has equivalent diagonals with odd numbers, square numbers, and square pyramidal numbers, respectively, and generates(by the same procedure) the Lucas numbers rather than Fibonacci.
Every other triangular number is a hexagonal number. .
This triangular number we are studying right now Pythagoras discovered it.
Every hexagonal number is also a triangular number.
Some numbers, like 36, can be arranged both as a square andas a triangle(see square triangular number).