- #1
reenmachine
Gold Member
- 514
- 8
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 with this result:
##\{ x \in R : \exists y \in N \ \ 3^y = x \ \ \ 1/(3^y) = x\}##
Here I'm wondering if the right side is correct.The reason for my doubts is the fact I used two properties of x instead of one.
thanks!
Last edited: