Answer
$20, 10, 5, 2.5, 1.25$
Work Step by Step
To solve this, we will apply the formula for the nth term of a geometric series. Once we get general formula, we will put values for n from 1 to 5 and determine the first five terms for the sequence:
$a_{n}=20 \times (\frac{1}{2})^{n-1}$
