Question

If A = {1, 2, 3, 4, 5} and B = {3, 6, 9, 12, 15}, what is A B?

{1, 2, 3, 4, 5, 6, 9, 12, 15}

{3}

{1, 2, 3, 3, 4, 5, 6, 9, 12, 15}

{ }

Answer 1

AB would be all the elements of both sets put together.

Answer 2

but with a U between them would be wat

Answer 3

That makes them a union. So use all elements, and make them a family. :3