That would the answers be for this question

[tex]\mathsf{We\;know\;that : \dfrac{a^m}{a^n} = a^m^-^n}[/tex]
[tex]\mathsf{Given : \dfrac{3^-^8}{3^-^4}}[/tex]
[tex]\mathsf{\implies 3^-^8^+^4}[/tex]
[tex]\mathsf{\implies 3^-^4}[/tex]
[tex]\mathsf{\implies \dfrac{1}{3^4}}[/tex]
[tex]\mathsf{So,\;The\;Given\;Expression\;can\;be\;written\;as : 3^-^4\;(or)\; \dfrac{1}{3^4}}[/tex]