Question
Let X be a set with exactly 5 elements and Y be a set with exactly 7 elements. If ? is the number of one-one
Let X be a set with exactly 5 elements and Y be a set with exactly 7 elements. If ? is the number of one-one functions from X to Y and ? is the number of onto functions from Y to X, then the value of (1/5!)(? – ?) is
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Introduction to the theory of computation
Authors: Michael Sipser
3rd edition
1133187790, 113318779X, 9781285401065 , 978-0470530658
