4. We need to write the following expression in radical form:
[tex]7^{\frac{4}{3}}[/tex]
Notice that:
[tex]a^{\frac{b}{c}}=\sqrt[c]{a}^b[/tex]
In this problem, we have:
[tex]\begin{gathered} a=7 \\ b=4 \\ c=3 \end{gathered}[/tex]
Thus, we obtain:
[tex]7^{\frac{4}{3}}=\sqrt[3]{7^4}[/tex]
