factorial
noun [ C ] mathematics specialized uk/fækˈtɔː.ri.əl/ us/fækˈtɔːr.i.əl/
阶乘，析因
the product of (= the result of multiplying) a whole number and all the whole numbers below it
The factorial of five (5 x 4 x 3 x 2 x 1) is 120. 5的阶乘（即5×4×3×2×1）是120。
Four factorial (4 x 3 x 2 x 1) is 24. 4的阶乘（即4×3×2×1）是24。
- More examples
- The factorial of a number n is n*n-1 *n-2*... *1.
- Assume that you have a simple method that calculates the factorial of a number.
- This result can be written concisely in terms of factorials.
factorial
adjective uk/fækˈtɔː.ri.əl/ us/fækˈtɔːr.i.əl/
(IN EXPERIMENT)
析因的
relating to a factor (= a fact or situation that influences a result)
an experiment with a factorial design (= with two or more factors) 析因设计的实验
- More examples
- The sample was composed of the full factorial combination of sex, age and education with equal numbers in each group.
- We began with the full factorial model involving all possible main effects and interactions.
- The 3 x 2 factorial study was designed to assess the efficacy and safety of 3 different dose levels of doxorubicin.
(MATHEMATICS)
mathematics specialized阶乘的
relating to factorials
The number is calculated as a multiplication 1 x 2 x 3 x 4 x 5 x 6=720, or expressed in factorial mathematics: 6!=720. 这个数字计算成乘法是1 x 2 x 3 x 4 x 5 x 6 = 720，或者用阶乘数学表示为: 6！= 720.
- More examples
- The author appears to have assumed this number would grow at a factorial rate.
- If, in the definition of t, you go from one term to the next by multiplication rather than addition, you get a factorial sequence.