Proof x y The coefficients of the variables and in the expansion of are called the binomial coefficients. n n The (k+1)th binomial coefficient of order ( a positive integer) is (k+1)th binomial coefficient n k gives the number of combinations of things at a time. Binomial Theorem Example Expand the binomial expression
Proof The coefficients of the variables x and y in the expansion of are called the binomial coefficients. The (k+1)th binomial coefficient of order n ( n a positive integer) is (k+1)th binomial coefficient gives the number of combinations of n things k at a time. Binomial Theorem Example Expand the binomial expression