Note that when you are dividing, and there is the same base, subtract
3^2/3^4 = 3^(2 - 4) = 3^(-2)
3^(-2) = 1/(3^2)
Simplify
1/(3^2) = 1/9
1/9 is your answer
hope this helps
Method #1:
[tex]\dfrac{3^2}{3^4}=\dfrac{3^2}{3^{2+2}}=\dfrac{3^2}{3^2\cdot3^2}=\dfrac{1}{3^2}=\dfrac{1}{9}[/tex]
Method #2:
[tex]\dfrac{3^2}{3^4}=3^{2-4}=3^{-2}=\dfrac{1}{3^2}=\dfrac{1}{9}[/tex]
used:
[tex]\dfrac{a^m}{a^n}=a^{n-m}\\\\a^{-n}=\dfrac{1}{a^n}[/tex]
Method #3:
[tex]\dfrac{3^2}{3^4}=\dfrac{\not3\cdot\not3}{\not3\cdot\not3\cdot3\cdot3}=\dfrac{1}{9}[/tex]