High Quality Content by WIKIPEDIA articles! In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides.Pyramid numbers can be modelled in physical space with a given number of balls and a square frame that hold in place the number of balls forming the base, that is, n2. They also solve the problem of counting the number of squares in an n x n grid. In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer; in other words, it is the product of some integer with itself. So, for example, 9 is a square number, since it can be written as 3 x 3. Square numbers are non-negative. Another way of saying that a (non-negative) number is a square number, is that its square root is again an integer. For example, ?9 = 3, so 9 is a square number.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.