Respostas

  • Usuário do Brainly
2014-07-19T17:54:32-03:00
Calcule
a) 
 3^{-2} = \frac{1}{ 3^{2} } = \frac{1}{9}
b)
    5^{-3} = \frac{1}{ 5^{3} } = \frac{1}{125}
c)
   (- 4)^{-2} =( \frac{-1}{4} ) ^{2} = \frac{1}{16}
d)
   (- 2)^{-4} =( \frac{-1}{2} ) ^{4} = \frac{1}{16}
e)
   e=c= \frac{1}{16}
f)
   ( 0,3)^{-1} =( \frac{3}{10} ) ^{-1} = \frac{10}{3}
g)
   ( 0,5)^{-1} =( \frac{5}{10} ) ^{-1} = \frac{10}{5} =2
h)
   ( \frac{2}{3} ) ^{-1} = \frac{3}{2}
i)
   ( \frac{3}{2} ) ^{-2} =( \frac{2}{3}) ^{2}  = \frac{4}{9}
j)
   ( \frac{2}{5} ) ^{-4} =( \frac{5}{2}) ^{4}  = \frac{625}{16}
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