Question

calcule as potências
a) (-5) elevado a 2 =
b) (-3)-4
c) (-2)-5

Answer 1

$a) \: ( - 5)^{2} = ( - 5) \times ( - 5) = 25$

$b)( - 3)^{ - 4} = \frac{1}{( - 3)^{4} } = \frac{1}{81}$

$c) \: ( - 2)^{ - 5} = \frac{1}{( - 2)^{5} } = \frac{1}{ - 32} = - \frac{1}{32}$