Question

Resolva: a) 9 ³ =
b) 7⁻⁴ =
c) (4/3)⁻²​

Answer 1

$a) {9}^{3} = 9 \times 9 \times 9 = 729 \\ b) {7}^{ - 4} = \frac{1}{ {7}^{4} } = \frac{1}{2401} \\ c) ( { \frac{4}{3} })^{ - 2} = \frac{4}{ {3}^{2} } = \frac{4}{9}$

${a}^{ - n} = \frac{1}{ {a}^{n} }$

Espero ter ajudado.