Question

calcule a seguintes expressões ​

Answer 1

Resposta:

Explicação passo a passo:

$a)$

$2^{-1} =\frac{1}{2^{1} } =\frac{1}{2}$

$b)$

$3^{-2} =\frac{1}{3^{2} }=\frac{1}{9}$

$c)$

$(\frac{5}{3}) ^{-1} =(\frac{3}{5}) ^{1}=\frac{3}{5}$

$d)$

$(\frac{2}{4}) ^{-2} =(\frac{4}{2}) ^{2} =2^{2} =4$

$e)$

$(-\frac{2}{3}) ^{-2} =(-\frac{3}{2}) ^{2} =\frac{9}{4}$

$f)$

$(-\frac{1}{2}) ^{-3} =(-\frac{2}{1}) ^{3} =(-2)^{3}=-8$