Question

1. Calcule o valor de:
a) 7-² b)(2/7)-¹. c)(-0,3)-². d)(-5/2)-³​

Answer 1

Resposta:

resposta nas explicações abaixo

Explicação passo-a-passo:

a) 7-² => $7^{-2} => \frac{1}{7}^{2} = \frac{1}{49}$

b)(2/7)-¹ => $(\frac{2}{7} )^{-1} => \frac{1}{\frac{2}{7} } => 1.\frac{7}{2} => \frac{7}{2}$

c)(-0,3)-²=> $(-\frac{3}{10})^{-2} => \frac{1}{(\frac{3}{10})^{2} } =>\frac{1}{(\frac{9}{100})^{} } => 1.\frac{100}{9} => \frac{100}{9}$

d)(-5/2)-³​=> $(-\frac{5}{2})^{-3} => \frac{1}{(-\frac{5}{2})^{3} } =>\frac{1}{(-\frac{125}{8})^{} } =>1.(-\frac{8}{125} )=> -\frac{8}{125}$