Question

2-⁴= qual respostaaaaa?

Answer 1

$\boxed{\begin{array}{l}\underline{\boldsymbol{ Expoente~negativo}}\\\huge\boxed{\boxed{\boxed{\boxed{\boxed{\tt\bigg(\dfrac{a}{b}\bigg)^{-n}=\bigg(\dfrac{b}{a}\bigg)^n}}}}}\\\\\tt 2^{-4}=\bigg(\dfrac{1}{2}\bigg)^4=\dfrac{1}{16}\end{array}}$

Answer 2

$\boxed{\begin{array}{l} \huge\boxed{\boxed{\boxed{\sf{a^{ - n} = \bigg(\frac{1}{a} \bigg)^{n} = \frac{1}{a^{ n} } }}}} \\ \\ \sf{2 {}^{ - 4} = \bigg(\dfrac{1}{2} \bigg)^{4} = \dfrac{1 {}^{4} }{2 {}^{4} } = \dfrac{1}{16} }\end{array}}$