Question

Qual valor da expressão (0,2)³ -1 / (0,2)+ 1 =

a ) 124/105
b ) 62/75
c ) 60/75
d) - 60/75
e) - 62/75

Answer 1

$\dfrac{(0,2)^3-1}{(0,2)+1} = \dfrac{0,008-1}{1,2}=\dfrac{-0,992}{1,2}\\ 75 / 1,2 = 62,5\\ 62,5 * -0,992 = -62\\ \boxed{-\dfrac{62}{75}}$