## Intermediate Algebra (6th Edition)

Geometric, $a_{1}=\dfrac{1}{2} \text{ and }\\ r=\dfrac{1}{5}$
The sequence $\left\{ \dfrac{1}{2},\dfrac{1}{10},\dfrac{1}{50} \right\}$ is a geometric sequence with \begin{array}{l} a_{1}=\dfrac{1}{2} \text{ and }\\ r=\dfrac{1}{5} .\end{array}