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please do not copy the wrong answer from other page

(vili) a) Prove that for ko + ki +2n, the number of sequences of Os, 1s, and n! 2s of length n which contain exactly ko Os, ki Is and k2 2s is kolki k2! (b) Generalize your formula to find the number of sequences of the numbers 0, 1,2,., m of length n in which the number j appears k, times. These numbers are called multinomial coefficients.
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