Question

scrieti numarul 81 ca putere cu baza:
3; 9
o treime sau o noime

Answer 1

$81=3^{4} \\ 81=9^{2}$

Answer 2

$81=3 ^{2} \\ \\ 81=3 ^{4} \\ \\81=( \frac{1}{3} )^{-4} \\ \\ 81=( \frac{1}{9} )^{-2}$