# Sequences

### Example 1

Determine whether the sequence is arithmetic, geometric, both, or neither.

If the sequence is arithmetic, find *d*. If the sequence is geometric, find *r*.

5, 5, 5, 5,...

### Example 2

Determine whether the sequence is arithmetic, geometric, both, or neither.

If the sequence is arithmetic, find *d*. If the sequence is geometric, find *r*.

1, 2, 5, 10, 17,...

### Example 3

Determine whether the sequence is arithmetic, geometric, both, or neither.

If the sequence is arithmetic, find *d*. If the sequence is geometric, find *r*.

81, -27, 9, -3,...

### Example 4

Determine whether the sequence is arithmetic, geometric, both, or neither.

If the sequence is arithmetic, find *d*. If the sequence is geometric, find *r*.

100, 90, 80 , 70, ...

### Example 5

Determine whether the sequence is arithmetic, geometric, both, or neither.

If the sequence is arithmetic, find *d*. If the sequence is geometric, find *r*.

100, 50, -25, 12.5, 6.25, -3.125, ...

### Example 6

Is it possible for a sequence to be both arithmetic and geometric?