Question

O valor da expressão 2/9 : (1 + 1/2)² = é:

a) 8/81
b) 81/8
c) 18/81
d) 81/18

Answer 1

Olá!

$\frac{ \frac{2}{9} }{(1 + \frac{1}{2})^{2}} = \frac{ \frac{2}{9} }{( \frac{2}{2} + \frac{1}{2})^{2}} = \frac{ \frac{2}{9} }{( \frac{3}{2} )^{2}} = \frac{ \frac{2}{9} }{\frac{9}{4}} = \frac{2}{9} \times \frac{4}{9} = \frac{8}{81}$

Alternativa a.

Bons estudos!