Question

If A = {positive even integers} and B = {positive odd integers}, what is A U B?

Answer 1

Natural Numbers

Answer 2

\[A U B \in \mathbb{Z}^+\]

Answer 3

ex: A includes 2, 4, 6, 8 ... so on.
B includes 1, 3, 5, 7, 9 .. so on.
The U operation is Union and it "puts" the two sets together.
Since we are only dealing with Positive integers - we have two types: Even and Odd, those include all positive integers.