Question

$( \frac{1}{3} ) {}^{ - 4}$

Answer 1

Invertemos, a fração e multiplicamos cada número

$\mathtt{(\dfrac{1}{3})^{-4}~~=~~ (\dfrac{3}{1})^4~~=~~\dfrac{3~.~3~.~3~.~3}{1~.~1~.1~.~1}~~=~~ \dfrac{9~.~9}{1}~~=~~ \dfrac{81}{1}~~=~~ 81}$