# Set Union/Examples/3 Arbitrarily Chosen Sets of Complex Numbers

## Example of Set Union

Let:

 $\displaystyle A$ $=$ $\displaystyle \set {1, i, -i}$ $\displaystyle B$ $=$ $\displaystyle \set {2, 1, -i}$ $\displaystyle C$ $=$ $\displaystyle \set {i, -1, 1 + i}$

Then:

$\paren {A \cup B} \cup C = \set {2, 1, -i,1, 1 + i}$