Respostas

2014-08-05T22:33:31-03:00
Bom, para isso iremos ter que calcular os valores. Observe:

A)(-2)-²-3.(0,5)³
[1/(-2)]²-3.(1/2)³
(1/4)-3.(1/8)
(1/4)-(3/8)
(8/32)-(12/32)
(8-12)/32
-4/32
-8

B)(1/2)+(1/2)².(1/2)^-³
(1/2)+(1/4).(2/1)³
(1/2)+(1/4).8
(1/2)+(8/4)
(1/2)+2
(1/2)+(4/2)
(1+4)/2
5/2
2,5

C)[-(5/4)-(-1/2)²]/(2/3)-¹
[(-5/4)-(1/4)]/(3/2)
[(-5-1)/4]/(3/2)
[(-6/4).2]/3
[(-12/4)]/3
[-3]/3
-1

Logo: (-8),(-1),(2,5) → A,C,B