Question 2: Let n 〉 2 be an integer Determine the number of strings consisting of n characters, where each character is an element of the set fa, b, 0) where A-S, B-S, and A n B-0. Let S be a set consisting of n elements. Consider ordered pairs (A, B), where AC S . Let S be a set consisting of n elements. Determine the number of ordered pairs (A, B), B C S, and IAn Bl-1. Prove that the number of such pairs is cqual ton 3-1
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