Question

9. Resolva. a) 2^-1 b) 5^-3 c) (1/2)^-2 d) (2/3)^_3​

preciso urgente

Answer 1

a)

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

b)

${5}^{ - 3} = {( \frac{1}{5}) }^{3} = \frac{ {1}^{3} }{ {5}^{3} } = \frac{1}{125}$

c)

${( \frac{1}{2}) }^{ - 2} = {( \frac{2}{1}) }^{2} = {2}^{2} = 4$

d)

${( \frac{2}{3}) }^{ - 3} = {( \frac{3}{2} )}^{3} = \frac{ {3}^{3} }{ {2}^{3} } = \frac{27}{8}$