Answer
The sequence is geometric.
Work Step by Step
The given sequence is
$192,24,3,\frac{3}{8},...$
Calculate ratio between each pair of consecutive terms.
$\frac{24}{192}=\frac{1}{8}$
$\frac{3}{24}=\frac{1}{8}$
$\frac{3/8}{3}=\frac{1}{8}$
The common ratio is $\frac{1}{8}$.
So, the sequence is geometric.