Question

Find the exponential generating function for the number of alphanumeric strings of length n n formed from the 26 26 uppercase letters of the English alphabet and 10 10 decimal digits if each vowel must appear at least one time; the letter T T must appear at least three times; the letter Z Z may appear at most three times; each even digit must appear an even number of times; and each odd digit must appear an odd number of times.

Answer 1

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Explanation:

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