Question

Qual é o valor do produto? (1-1/2)x(1-1/8)x(1-1/4)x(1-1/5)

Answer 1

(1-1/2)x(1-1/8)x(1-1/4)x(1-1/5)

1/2 x 7/8 x 3/4 x 4/5= 21/80

Answer 2

$( 1 - \frac{1}{2}). ( 1 - \frac{1}{8}).( 1 - \frac{1}{4}).( 1 - \frac{1}{5}) = \\ \\ ( \frac{2-1}{2}).( \frac{8-1}{8}) .( \frac{4-1}{4}) .( \frac{5-1}{5}) = \\ \\ \frac{1}{2} . \frac{7}{8}. \frac{3}{4} . \frac{4}{5} = \\ \\ \frac{1.7.3.4}{2.8.4.5} = \\ \\ \frac{84}{320} = \frac{42}{160} = \frac{21}{80}$