Question

Determine o valor de:

A:(1/9) -1=

B:(-5/3)-2=

C: -(-7/2)-1=

D: (+2/3)-3=

As barras correspondem a riscos retos..

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{a)\:\left(\dfrac{1}{9}\right)^{-1} = \left(\dfrac{9}{1}\right)^{1} = 9}$

$\mathsf{b)\:\left(-\dfrac{5}{3}\right)^{-2} = \left(-\dfrac{3}{5}\right)^{2} = \left(\dfrac{9}{25}\right)}$

$\mathsf{c)\:-\left(-\dfrac{7}{2}\right)^{-1} = -\left(-\dfrac{2}{7}\right)^{1} = -\left(-\dfrac{2}{7}\right) = \left(\dfrac{2}{7}\right)}$

$\mathsf{d)\:\left(+\dfrac{2}{3}\right)^{-3} = \left(\dfrac{3}{2}\right)^{3} = \left(\dfrac{27}{8}\right)}$