factorial
Meaning: The product of all positive integers from 1 up to a given number, denoted by an exclamation mark (e.g., 5! = 120). As an adjective, it means relating to a factor or factorial.
Factorials grow extraordinarily quickly and are fundamental in combinatorics, probability, and algebra. They appear in formulae for permutations, combinations, and Taylor series expansions. By convention, 0! is defined as 1. The term also appears in 'factorial design,' a type of experiment in statistics that examines the effects of multiple variables simultaneously.
Examples
- The factorial of six is 720, calculated by multiplying 6 by 5 by 4 by 3 by 2 by 1. 6的阶乘是720,由6乘5乘4乘3乘2乘1计算得出。El factorial de seis es 720, calculado multiplicando 6 por 5 por 4 por 3 por 2 por 1.6の階乗は720であり、6×5×4×3×2×1で計算されます。6의 계승은 720이며, 6×5×4×3×2×1로 계산됩니다.
- Factorial notation simplifies the expression of permutation and combination formulae considerably. 阶乘记法大大简化了排列和组合公式的表达。La notación factorial simplifica considerablemente la expresión de las fórmulas de permutaciones y combinaciones.階乗の記法は、順列や組合せの公式の表現を大幅に簡潔にします。계승 표기법은 순열과 조합 공식의 표현을 크게 간결하게 합니다.
- The researchers employed a factorial design to test the interaction between temperature and pressure. 研究人员采用析因设计来测试温度和压力之间的交互效应。Los investigadores emplearon un diseño factorial para examinar la interacción entre temperatura y presión.研究者たちは温度と圧力の相互作用を検証するために要因計画を用いました。연구자들은 온도와 압력의 상호작용을 검증하기 위해 요인 설계를 사용했습니다.
Pronunciation
Usage Guide
Context: academic, scientific
Tone: neutral
Origin & History
From French factoriel, derived from Latin factor (one who does or makes), from facere (to do, to make). The mathematical sense was established in the early 19th century.
Cultural Context
Era: Modern
Generation: All ages
Social background: Universal
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