Exercise 1.10. Prove for any set X and for any subsets A and B of X,...

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Exercise 1.10. Prove for any set X and for any subsets A and B of X, the set A can be written as a disjoint union in the form

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AnB A B AUB

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Exercise 1.10. Prove for any set X and for any subsets A and B of X,...

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