Question

Calcule 2^-1 + 2° + 2¹ + 2² -2³

Answer 1

2^-1  = 1/2
2º = 1
2^1= 2
2^2 = 4
-2^3 = -8

1/2 +1 +2 +4 -8

1/2 -1 =  
(mmc)

1 - 2           -1
_____   =  ___      , ou, -0,5
.  2               2

Answer 2

2+4-8+2,0º+ (1:2¹)

-2+2,0º+ (1:2)

-4+2×2.0º+1
<=> -----------------—
2

2×2.0º -3
<=> —————
2

<=>. 0.5