Question

Calcule as potência 4-2

Answer 1

Resposta:

4^2 - 2^2

Explicação passo a passo:

16 - 4 = 12

Answer 2

• Não está claro sua pergunta...
• No entanto, farei de duas formas:

$\sf4^{-2}\Rightarrow\boxed{a^n=\frac{1}{a^n}}\bigstar\Rightarrow\frac{1}{4^2}\Rightarrow\boxed{\frac{1}{16}~ou~2^{-4}}~\checkmark$

Ou,

$\sf4^{2}-2^{2}\\\\\sf4^2\Rightarrow\left(2^2\right)^2\Rightarrow2^{2\cdot2}\Rightarrow2^4\\\\\sf2^4-2^2\\\\\sf\underline{Fatorando:}\\\\\sf~2^{2+2}-2^2\\\\\sf\boxed{a^{m+n}=a^n\cdot\,\!a^m}\bigstar\\\\\sf2^2\cdot2^2-2^2\\\\\textbf{ \underline{Colocando~2^2~em~evid\hat{e}ncia:} }\\\\\sf~2^2\cdot(2^2-1)\Rightarrow4\cdot(4-1)\Rightarrow4\cdot3\Rightarrow\boxed{12}~\checkmark$