91Ó°ÊÓ

In the exercise, determine if each sequence is arithmetic, geometric or neither. If arithmetic, indicate the common difference. If geometric, indicate the common ratio.

$12,6,0,-6,-12,-18,...$

In the exercise, determine if the sequence is arithmetic, geometric or neither. If arithmetic, indicate the common difference. If geometric, indicate the common ratio.

$-7,-2,3,8,13,18,...$

In the exercise, determine if each sequence is arithmetic, geometric or neither. If arithmetic, indicate the common difference. If geometric, indicate the common ratio.

$5,9,13,17,21,...$

In the following exercises, determine if each sequence is arithmetic, geometric or neither. If arithmetic, indicate the common difference. If geometric, indicate the common ratio.

$\frac{1}{2},\frac{1}{4},\frac{1}{8},\frac{1}{16},\frac{1}{32},\frac{1}{64},....$

In the following exercises, determine if each sequence is arithmetic, geometric or neither. If arithmetic, indicate the common difference. If geometric, indicate the common ratio.

$4,8,12,24,48,96,...$

In the following exercises, write the first five terms of each geometric sequence with the given first term and common ratio.

$a_1=4$and$r=3$

In the following exercise, write the first five terms of the sequence whose general term is given.

$a_n={\left(−1\right)}^nâ‹\dots 3n$

In the following exercises, write the first five terms of each geometric sequence with the given first term and common ratio.

$a_1=9$and$r=2$

In the following exercises, write the first five terms of each geometric sequence with the given first term and common ratio.

$a_1=-4$and$r=-2$

In the following exercises, write the first five terms of each geometric sequence with the given first term and common ratio.

$a_1=-5$and$r=-3$