## Elementary Algebra

We will use the rule $\frac{a^{m}}{a^{n}}=a^{m-n}$ in the simplification of the expression: $\frac{2^{\frac{9}{4}}}{2^{\frac{1}{4}}}=2^{\frac{9}{4}-\frac{1}{4}}=2^{\frac{9-1}{4}}=2^{\frac{8}{4}}=2^{2}=4$