Question

Which expressions are equivalent to the one below? Check all that apply. 211

Answer 1

we have the expression

$\begin{gathered} \frac{21^x}{7^x}=\frac{(7*3)^x}{7^x}=\frac{7^x*3^x}{7^x}=3^x \\ \frac{21^{x}}{7^{x}}=(\frac{21}{7})^x \end{gathered}$

therefore

The answer is the option

B, D, and E