Question

calcule o valor das expressões. c) 3-¹ + (3/2)-¹ d) 8-¹• (⅔)² f) (-⅔)² - (-⅔)-² h) -2⁴/(⅕)-¹ + (-1)⁵​

Answer 1

Resposta:

Explicação passo-a-passo:

c) 3-¹ + (3/2)-¹

= 1/3 + 2/3

= 3/3

= 1

___________

d) 8-¹• (⅔)²

= 1/8 . 4/9

= 4/8 (:4)/(:4) . 1/9

= 1/2 . 1/9

= 1/18

______________

f) (-⅔)² - (-⅔)-²

= 4/9 - (-3/2)^2

= 4/9 - (9/4)

= 4/9 - 9/4

Mmc (4,9) = 36

= (4.4 - 9.9)/36

= (16-81)/36

= - 65/36

-------------------------!

h) -2⁴/(⅕)-¹ + (-1)⁵

= - 16/5 - 1

= (-16-5.1)/5

= (-16-5/5

= -21/5