The coefficient of xn−kyk is given by the formula ( n k ) = n ! k ! ( n − k ) ! {\displaystyle {n \choose k}={\frac {n!}{k!(n-k)!}}} which is defined in terms of the factorial function n!.
Koeficijent od xn−kyk je zadan formulom ( n k ) = n ! k ! ( n − k ) ! {\displaystyle {n \choose k}={\frac {n!}{k!\,(n-k)!}}} , koji je definiran funkcijom faktorijela.