Question

alguém me AJUDA PFV
URGENTEE!!​

Answer 1

Resposta:

(c)

Explicação passo-a-passo:

I) Correta

$2^{x}.4^{3}=2^{6+x}\\2^{x}.(2^{2})^{3}=2^{6+x}\\2^{x}.2^{6}=2^{6+x}\\2^{6+x}=2^{6+x}$

II) Errada

$25:5^{3}=5^{1}\\5^{2}:5^{3}=5^{1}\\5^{-1}\neq 5^{1}$

III) Correta

$\frac{3^{2}}{7^{2}}=(\frac{3}{7})^{2}\\ \frac{3^{2}}{7^{2}}=\frac{3^{2}}{7^{2}}$