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Given that A = {3,5,7,9} and B = {6,10,14,16}, how many functions f: A 9 B are there (i) in total? (ii) which are one-to-one?

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Given that A = {3,5,7,9} and B = {6,10,14,16}, how many functions f: A 9 B are there (i) in total? (ii) which are one-to-one? (iii) with f(3) = 6 and f(5) = 10? (iv) which are onto

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