Question

2) Resolva as potências:
a) 23
b) -23
c) (-2)3
d) (2/5)2
3) Resolva as expressões:
a)[(2 + 7) – (4 – 5)] x 3 =

Answer 1

Explicação passo-a-passo:

2)

a) 2³=2.2.2=8

b) -2³=-2.-2.-2=-8

c) (-2)³=-8

d) (2/5)² = (2²/5²)=4/25

3)

a)[(2+7)-(4-5)]×3

[9-(-1)]×3

[9+1]×3

10×3

30