Question

Preciso de ajuda pfv

Answer 1

Resposta:

1)

a)

${9}^{5} \times {9}^{ - 5} = {9}^{5 - 5} = {9}^{0} = 1$

b)

${10}^{4} \times {10}^{ - 6} = {10}^{4 - 6} = {10}^{ - 2} = { (\frac{1}{10} })^{2} = \frac{1}{100}$

c)

${12}^{0} \times {12}^{1} \times {12}^{ - 1} = 1 \times {12}^{1 - 1} = 1 \times {12}^{0} = 1 \times 1 = 1$

d)

$({ \frac{1}{8} })^{2} + {8}^{ - 2} = \frac{1}{16} + ( \frac{1}{8} )^{2} = \frac{1}{16} + \frac{1}{64} = \frac{4 + 1}{64} = \frac{5}{64}$

e)

${ ( - \frac {1}{3} })^{2} - ( { - \frac{ 1}{2} })^{3} = \frac{1}{9} - \frac{1}{8} = \frac{8 - 9}{72} = - \frac{1}{72}$