Question

Which expressions are equivalent to the one below? Check all that apply. ไ 21% 3x

Answer 1

we have the expression

$\frac{21^x}{3^{^x}}$

so

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

therefore

the answers are

options B, C and D