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Unformatted text preview: f ( x ) = x 24 x 2 + 1 . Show that f is a bijection and nd f1 . Hint: If you can nd the inverse of f , this will prove f is a bijection. Exercise 58. Let S denote the collection of all sets. Prove that = { ( X,Y ) S 2  there is a bijection f : X Y } is an equivalence relation on S ....
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 Fall '09
 RyanDaileda
 Math

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