Question

9) Calcule as potências:
a) (-2/5x)²
b) (2/3xy)³
c) (-1/2a)^4

Answer 1

Resposta:

a) 4a^{3}=4a

3

= 64a^{3}64a

3

b) (\frac{-2}{5x})^{2}=\frac{4}{25x^{2} }(

5x

−2

)

2

=

25x

2

4

c) (\frac{2}{3xy})^{3} = \frac{8}{27x^3y^3}(

3xy

2

)

3

=

27x

3

y

3

8