Question

Calcule a potencia 5^-3

(1/2)-1

(-0,2)-3

-7-4

Answer 1

Resposta: $\frac{-3449}{250}$

Explicação passo a passo:
$\frac{1}{5^{3} }$ x $\frac{1}{2}$ + 0,2 -3 -7 -4
$\frac{1}{125}$ x $\frac{1}{2}$ + $\frac{1}{5}$ -3 -7 -4
$\frac{1}{250}$ x $\frac{1}{5}$ -3 -7 -4
$\frac{51}{250}$ -3 -7 -4
 $\frac{51}{250}$ -14
$\frac{51-3500}{250}$
$\frac{-3449}{250}$

Answer 2

Calcule a potência:

A) 5^-3
(1/5)^3 = 1/125
______________

B)
(1/2)-1
= 2^1
= 2
_________________

C)
(-0,2)^(-3)
= (-2/10)^(-3)
= (-10/2)^(3)
= -5^3
= - 125

D)
= -7-4
= -1/7^(4)
= - 1/7.1/7.1/7.1/7
= - 1/49 . 1/49
= - 1/2401