Question

Qual o valor exato de \dfrac {2}{3} - \dfrac {1}{2}​3​​2​​−​2​​1​​?


a) dfrac {1}{2}​2​​1​​

b)dfrac {1}{2}−​2​​1​​

c) dfrac {1}{6}​6​​1​​


​

Answer 1

Resposta:

A) dfrac{1}{2}21

b)dfrac {1}{2}−21

c) dfrac {1}{6}61

Answer 2

2/3 - 1/2 32 - 21

2/3 - 32/2 - 21

2/3 - 16 - 21

-109/3

N.D.A