Resposta:
[tex]\sf \displaystyle f(x) = ?[/tex]
[tex]\sf \displaystyle x = \dfrac{1}{3}[/tex]
[tex]\sf \displaystyle f(x) = 8^x[/tex]
[tex]\sf \displaystyle f\left ( \dfrac{1}{3} \right ) = 8^{\frac{1}{3}}[/tex]
[tex]\sf \displaystyle f\left ( \dfrac{1}{3} \right ) = 2^{2^{\frac{1}{3}} }[/tex]
[tex]\sf \displaystyle f\left ( \dfrac{1}{3} \right ) = 2^{{\frac{3}{3}} }[/tex]
[tex]\sf \displaystyle f\left ( \dfrac{1}{3} \right ) = 2^{1 }[/tex]
[tex]\boxed{ \boxed { \boldsymbol{ \sf \displaystyle \sf \displaystyle f\left ( \dfrac{1}{3} \right ) = 2 } }}} \quad \gets \mathbf{ Resposta }[/tex]
Explicação passo-a-passo:
