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Let f be a function from A to B and f -1 exist. Let S and T be subsets of B. Which of the following is true?

1. f -1 (S ∪ T) = f -1 (S) ∪ f -1 (T)

2. f -1 (S ∩ T) = f -1 (S) ∩ f -1 (T)

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