 Solution

ID: past-exam-of-the-year-1-of-the-computer-science-course-of-the-university-of-oxford/2017/discrete-mathematics-continuous-mathematics-and-probability/1/a/solution

The relative complement consists of the elements of the first set absent from the second, while the symmetric difference consists of elements in exactly one set:

A ∖ B = {x : x \in A, x \in / B}, A \oplus B = (A ∖ B) \cup (B ∖ A) .

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