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14. Prove that equality holds in Parts (b) and (c) of Theorem 1.1.7 if the function...

14. Prove that equality holds in Parts (b) and (c) of Theorem 1.1.7 if the function f is one-to-one.

(b) f(E ∩ F) ⊂ f(E) ∩ f(F)

(c) f(E) \ f(F) ⊂ f(E \ F) if F ⊂ E

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