Question

8. Calcule as potências
a) (3/7)-² =
b) (2/5)-¹ =
c) ( +⁵/⁹)-²=​

Answer 1

a) (3/7)-² = (7/3)² = 49/9

b) (2/5)-¹ = (5/2)¹ = 5/2

c) ( +⁵/⁹)-²= (9/5)² = 81/25