Question

What is 5 raise to power -3 multiply by (4/5) raise to the power -3

Answer 1

${5}^{ - 3} \times (\frac{4}{5} )^{ - 3} \\ = (5 \times \frac{4}{5} ) ^{ - 3} \\ = ({ \frac{4}{1} })^{ - 3} \\ = ( \frac{1}{4 }) ^{3} \\ = \frac{1}{64}$