Finite Math Examples

${(1 + i)}^{n} + {(1 - i)}^{n}$

Step 1

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${n | n \in ℝ}$

Step 2