Question

5- Calcule as potências
a) (3/4)-² d) 2-¹
b) (-5/4)-³ e) (-6)-²
c) 10-³ f) (1/9)-²​

Answer 1

Resposta:

a) (3/4)⁻² = (4/3)² = (4.4)/(3.3) = 16/3

b) (-5/4)⁻³ = (-4/5)³ = (4.4.4)/(-5.-5.-5) = 64/125

c) (10)⁻³ = (1/10)³ = 1000

d) 2⁻¹ = 1/2

e) (-6)⁻² = (-1/6)² = (-1.-1)/(6.6) = 1/36

f) (1/9)⁻² = (9/1)² = 9.9 = 81