Work Step by Step
The symbol $\cup $ indicates a union of sets (of intervals). Graph each interval and find the union (the set containing numbers that belong to either the first, or the second, or both intervals).
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.