Real Sequence/Examples/(-1)^n

Examples of Real Sequence
The first few terms of the real sequence:


 * $S = \sequence {\paren {-1}^n}_{n \mathop \ge 1}$

are:
 * $-1, +1, -1, +1, \dotsc$

This is an example of the real sequence:
 * $S = \sequence {x^n}$

where $x = -1$.

$S$ is not monotone, either increasing or decreasing.