# Suppose F: X Y is one-to-one.a. Prove that for all subsets

## Problem 40E Chapter 7.2

Discrete Mathematics with Applications | 4th Edition

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Problem 40E

Suppose F: X ? Y is one-to-one.a. Prove that for all subsets A ? X, F-1 (F(A)) = A.________________b. Prove that for all subsets A1 and A2 in X,F(A1 ? A2) = F(A1) ? F(A2).

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