[tex] \sqrt{16}^{ \frac{3}{4} } [/tex]

[tex] \sqrt{16}^{ \frac{3}{4} } \\ \sqrt{2^{4}}^{ \frac{3}{4} } \\ \sqrt{2^{3} } \\ \sqrt{8} \\ \sqrt{4 \times 2} = 2 \sqrt{2} [/tex]