Last Updated
：2025/11/22
binomial coefficient
Noun
Japanese Meaning
二項係数：二項定理における項の係数。すなわち、(x + y)ⁿ の展開で各項に現れる係数で、nCk（n個の中からk個を選ぶ組み合わせ数）として定義される。
（ plural ）
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(combinatorics) a coefficient of any of the terms in the expansion of the binomial (x+y)ⁿ, defined by n choose k=(n!)/(k!(n-k)!), read as n choose k
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binomial coefficient
The binomial coefficient appears frequently in combinatorics problems involving combinations and Pascal's triangle.
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The binomial coefficient appears frequently in combinatorics problems involving combinations and Pascal's triangle.
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