# Sequences

### Topics

For those who like pictures better than formulas, we can visualize sequences on number lines and on graphs. For those who like Kit Kats, we can visualize a giant Kit Kat bar. Either way, creating an image will help us understand better how some sequences behave.

## Numberlines

Some sequences are well-behaved like well-trained dogs, while others are as unpredictable as wild tigers. If we plot the terms of a sequence on a number line, we can get some intuition for what the terms of the sequence are doing.

### Sample Problem

Plot the first five terms of the sequence , starting at *n* = 1, on a number line.

Answer.

The first five terms are

Plotting these on a number line, we get

We can see that as *n* gets larger, the terms of the sequence are clumping around 0.

Even if we don't label the terms *a _{n}* on the number line, we can still tell something about what the sequence is doing.