Simplify $\sqrt[8]{7^4}$ using the power of a power property: $\left(a^m\right)^n=a^{m\cdot n}$. In the expression, $m$ equals $4$ and $n$ equals $\frac{1}{8}$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=1$, $b=8$, $c=4$, $a/b=\frac{1}{8}$ e $ca/b=4\cdot \left(\frac{1}{8}\right)$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=4$, $b=8$ e $a/b=\frac{4}{8}$