[tex](0.5) {}^{ - 3} [/tex]
> Converta
[tex]0.5 = \frac{5}{10} \div \: \frac{5}{5} = \frac{1}{2} [/tex]
[tex]( \frac{1}{2} ) {}^{ - 3} [/tex]
[tex]( \frac{1}{a} ) {}^{ - n} [/tex]
[tex]= a {}^{n} [/tex]
> Substituindo:
[tex]2 {}^{3} [/tex]
[tex] = 8[/tex]
