Homework Statement
As an exercise , the book I'm reading ask me to build a set notation for the following set:
##\{... \ , \frac{1}{27} \ , \frac{1}{9} \ , \frac{1}{3} \ , 1 \ , 3 \ , 9 \ , 27 , \ ...\}##
The Attempt at a Solution
After playing with the numbers a couple of minutes , I came...