Express $9^{-1}$9−1 as a fraction in simplest form.
Express $55^{-1}$55−1 as a fraction in simplest form.
Express $6^{-10}$6−10 with a positive exponent.
Express $73^{-14}$73−14 with a positive exponent.
Know and apply the properties of integer exponents to generate equivalent numerical expressions.