Answer:
[tex] \frac{1}{ \sqrt[7]{ {12}^{4} } } [/tex]
Step-by-step explanation:
[tex] {12}^{ - \frac{4}{7} } is \: the \: same \: as \\ \frac{1}{ {12}^{ \frac{4}{7} } } \\ {12}^{ \frac{4}{7} } can \: also \: be \: expressed \: as \\ \sqrt[7]{ {12}^{4} } [/tex]
Therefore:
[tex] {12} ^ { -\frac{4}{7} } \: is \: equivalent \: to \\ \frac{1}{ \sqrt[7]{ {12}^{4} } } [/tex]
