Work Step by Step
B′ includes all the members of U that are not members of B. List the members of U, and cross out the ones that are members of B. The remaining are members of B′.
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.