3- Calcule:
a) 3³
b) (-5)-⁴

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