Answer
Geometric
Work Step by Step
$66 \\33=(1/2) 66\\16.5 =(1/2) (33)$.... so on
The quotient ratio of the neighboring terms is constant which is given as: $\dfrac{a_n}{a_n-1}=\dfrac{1}{2}$
It has been seen that $a_1=66; r=\dfrac{1}{2}$
Thus, the series is geometric.
