Character; Role; letter
In mathematics
In the field of science,
In human culture,
Mathematical attribute
In American culture,
In music score
In basic computer applications
Character; Role; letter
1 (Arabic numerals) is also a natural number.
Pinyin: yι
(1) (serial number and Arabic numerals for general minor questions)
1. (Same as ①)
(1) (same as (1))
I (Simplified Chinese) Pronunciation: y ι; It is also vulgar to pronounce "Yao" y ā o.
(a) (Simplified Chinese with brackets)
One (Simplified Chinese) is capitalized (commonly used in bank accounting), and the other (Chinese variant) is pronounced y ○.
I (Roman numerals)
English: one (cardinal word, one) first (ordinal number, first) once (once).
ぃち (Japanese)
Ning (Korean)
In mathematics
1, Arabic numerals.
2 is a natural number and an integer between 0 and 2.
3. The smallest positive odd number.
4. The smallest positive integer.
5. Second smallest natural number.
6. It is neither a prime number (prime number) nor a composite number.
7. Any number divided by 1 is equal to itself.
8. Any number multiplied by 1 equals itself.
9. The greatest common factor of two prime numbers is 1.
10 can be converted into any false fraction with the same numerator and denominator.
1 1 and 1 are factors of any natural number.
The factors of 12 and 1 are only its own.
The reciprocal of 13 and 1 is still 1.
14 and 1 are-1 and 1 2 of Fibonacci series, which are the numbers with the highest frequency.
The absolute values of 15 and 1 are still 1.
The arithmetic square roots of 16 and 1 are still 1.
Roman numeral
Ⅰ
binary system
1(000 1)
decimal system
1
hexadecimal
1 (0 1)
Octal
1
A whole consisting of one or several things can be regarded as the unit "1". For example, a circle can be regarded as the unit "1", and dividing it into three parts is the unit "1" divided by three to get one third.
In the field of science,
In computer science, 1 is often used to express -{zh-cn: Boolean value; True value of zh-tw: Boolean value}-
In computer science, 1 is often used to represent the "true" value of a Boolean value.
In geometrical optics, the refractive index of vacuum is 1.
Astronomically, the average distance between the sun and the earth is 1 astronomical unit.
Linear function: Independent variable X and dependent variable Y have the following relationship:
Y=kx+b (k is an arbitrary non-zero real number and b is an arbitrary real number)
It is said that y is a linear function of x at this time.
Newton's first law of motion: when there is no external force acting on all objects, they always keep a uniform linear motion or a static state. All objects always keep moving in a straight line or at rest until an unbalanced external force forces them to change this state.
Kepler's first law: the orbits of all planets in the solar system around the sun are ellipses, and the sun is at a focus of all ellipses.
The first law of thermodynamics: also known as the principle of energy invariance, is the law of energy conservation. Basic content: heat can be converted into work, and work can also be converted into heat; Consuming a certain amount of work will produce a certain amount of heat, and when a certain amount of heat disappears, it will also produce a certain amount of work.
In human culture,
The ancient writing of "Yi" is "Mi". In Chinese dictionaries with radical indexing as the main index, "Yi" is often the first radical and the first word.
In human culture, the word "one" gives the meaning of the beginning of all things: "Tai Chi is the only beginning, Tao stands in one, heaven and earth are divided into all things, and all things are unified" (Shuo Wen Jie Zi).
In English, "freshman" is also used to refer to the Lord God in the Bible.
The basic denomination of currency, such as USD 1, NT 1 Yuan.
In philosophy, especially in Laozi, one is relatively extensive. "Tao gives birth to one, life gives birth to two, life gives birth to three, and life gives birth to everything. Everything is negative and holds yang, thinking that it is harmonious. " (Chapter 42 of Laozi) is one of them. The first is the beginning of everything. Ancient philosophers regarded one as the beginning of all things and called it Tai Chi. "Tai Chi gives birth to two instruments, two instruments give birth to four elephants, and four elephants give birth to gossip."
Moreover, among the ancient gods in China, the Eastern Emperor Taiyi was regarded as a great god. In Qu Yuan's Lisao, there is a poem about the Eastern Emperor Taiyi.
"One" can also be used as a unit of some constants, such as moles.
Table-Integer
In GAY, it is an insert.
& lt& lt0 1 2 3 4 5 6 7 8 9 >； & gt
Mathematical attribute
1^n= 1
N÷n= 1(n is not 0)
(a ÷ b) × (b ÷ a) =1(neither a nor b is 0).
For any number x:
x 1 = 1 x = x
x/ 1 = x
x^ 1 = x
1^x = 1
X@ 1 = x and 1@x = 1
For any number x, when x is not 0, x 0 =1.
square number
Composite number of the first 1 height
Triangular number
Rectangular number
Fibonacci sequence 1 and 2 terms.
1 cannot be used as the radix of the carry system.
1 cannot be the base of logarithm.
The reciprocal of 1 is itself.
In factorial, 0! = 1! = 1
In probability theory, the probability of random events in any sample space is defined as 1.
1 is a positive number, an integer, the smallest positive odd number and an algebraic number.
In geometry, the radius of the unit circle is 1.
Euler formula establishes the relationship between the five most important constants in mathematics in the simplest way. The formula contains 1 0, the base e of natural logarithm, pi and imaginary unit I of complex number!
1× 1= 1
In American culture,
1 is a small attack, which means a person who plays a male role, and 0 is a person who plays a female role, also called a small attack. 0.5 is both offensive and defensive.
In music score
In the music score, 1 stands for 1 basic sounds in the scale, and the pronunciation is do (homophonic Chinese character is sinus).
In basic computer applications
1 and 0 are the basic units of computer storage, including everything you see on the computer now is composed of 1 and 0, one for each character and one for each of the eight characters. The images and videos we see in the computer are all calculated by the computer through countless 1 and 0 in the memory.