Last Updated:2025/11/22

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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二項係数は、(x + y)^n の展開における項の係数(n 個から k 個を選ぶ組合せ nCk = n!/(k!(n−k)!) と定義される)として、組合せやパスカルの三角形に関する組合せ論の問題によく現れます。

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