3- Calcule:
a) 3³
b) (-5)-⁴
![3 Calculea 3b 5 class=](https://pt-static.z-dn.net/files/d32/fd9334fa9c78326404b7b5f747c7b860.jpg)
Resposta:
a) 3.3.3 = 27
b) (-5) -⁴ = 1/5⁴ = 1/625
c) (7/9) -³ = (9/7)³ = 729/343
d) ((3⁶.3-²)/3⁴)) -¹ = (3⁴/3⁴) -¹ = 1 -¹ = 1