Resposta :
Seja [tex]\text{x}=\left(\dfrac{1}{2}+\dfrac{1}{2}+\dfrac{1}{2}\right)\times\left(\dfrac{1}{2}\right)^3[/tex]
Observe que:
[tex]\left(\dfrac{1}{2}+\dfrac{1}{2}+\dfrac{1}{2}\right)=3\cdot\dfrac{1}{2}=\dfrac{3}{2}[/tex]
E [tex]\left(\dfrac{1}{2}\right)^3=\dfrac{1^3}{2^3}=\dfrac{1}{8}[/tex]
Logo:
[tex]\text{x}=\dfrac{3}{2}\times\dfrac{1}{8}=\dfrac{3}{16}[/tex]