Question

Simplificando a expressão:
[1+ 1/2) :3 ] : (2/3-1), temos:
a) 5/12
b) 20/21
c) -6/5
d) -13/15

Answer 1

[(1+1/2):3] :(2/3-1) = 
[(2/2+1/2):3] : (2/3-3/3) = 
[(1/2):3] : (-1/3) = 
[1/2 . 1/3] : (-1/3) = 
[1/6] . -3 = 
-3/6 = -3:3/6:3 = -1/2