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November 1st, 2011, 10:06 AM   #1
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function question

Let f : A ? B and g : B ? C be two one-to-one correspondences, what are the domain and the range of (g ? f )?1. Show that (g ? f )?1 = f ?1 ? g?1
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November 1st, 2011, 10:44 PM   #2
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Do you understand the question? If so, what progress have you made so far?
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