
1 - Wikipedia
1 (one, unit, unity) is a number, numeral, and glyph. It is the first and smallest positive integer of the infinite sequence of natural numbers.
1(自然数之一)_百度百科
1是一个 自然数,是最小的 正整数,是最小的正 奇数。 1是一个 有理数,是一位数,也是 奇数。 1既不是 质数 也不是 合数。 1的n 次方 (n∈R)都等于1。 1的 倒数 是它本身。 一个或者几 …
1 - 维基百科,自由的百科全书
1 (中文也作 一)是一个 数字 、 数词 和 符号。 它是 自然数 无限序列中第一个也是最小的 正整数。 这一基本属性使其在其他领域中具有独特用途,从科学到体育,通常表示一个群体中的 …
1 - 维基词典,自由的多语言词典
近義詞: ˥ 、 ˩ (語音學,漢字文化圈,通常上標) 一聲,通常與 陰平 相關聯。 如果不區分陰陽,可以簡單地稱為 平聲 (四聲)。 近義詞: ꜀ (語言學,上標) 挪威語 、 瑞典語 、 林堡語 …
1 (number) - Simple English Wikipedia, the free encyclopedia
One (1) is the first natural number, followed by two. The Roman numeral for one is I. In mathematics, the number one is the multiplicative identity. [1] . It is also the only number for …
1 (number) - New World Encyclopedia
1 (one) is a number, numeral, and the glyph that represents the number. It represents a single entity and is commonly regarded as the fundamental unit of counting and measurement. For …
为什么 1 不能被认为是质数? - 知乎
1原本是作为质数的,因为它本身满足质数的定义(1只可以被1和它本身整除)。 1之所以被排除质数的范围,是因为我们有如下定理:
1 -- from Wolfram MathWorld
Jun 18, 2025 · The number one (1), also called "unity," is the first positive integer. It is an odd number. Although the number 1 used to be considered a prime number, it requires special …
1 (number) | Math Wiki | Fandom
1 is the Hindu-Arabic numeral for the number one (the unit). It is the smallest positive integer, and smallest natural number. 1 is the multiplicative identity, i.e. any number multiplied by 1 equals …
The number one - Britannica
For example, 7 = 1 + 1 + 1 + 1 + 1 + 1 + 1. The number… Not surprisingly, the number 1 is generally treated as a symbol of unity. Therefore, in monotheistic religions, it often symbolizes …