Mathematics

Problem

Simplify and express each as a rational number: a.

\left(\frac{4}{9}\right)^6 \times \left(\frac{4}{9}\right)^{-4}

\left(\frac{-7}{8}\right)^{-3} \times \left(\frac{-7}{8}\right)^2

\left(\frac{4}{3}\right)^{-3} \times \left(\frac{4}{3}\right)^{-2}