# 1.6 Sets

## Difference

For sets $$A$$ and $$B$$, which of the following are equivalent to $$A – B$$?

Exercise 1

In English, $$A-B$$ is the set of elements in $$A$$ and not in $$B$$. Only $$\{ x \mid (x \in A) \text{ AND } (x \notin B) \}$$ matches this description.