Question

(7^-2/3)^3

Answer 1

use the power of a power index law and multiply the powers

\[(x^a)^b = x^{a \times b}\]

Answer 2

(7^-2/3)^3
(1/7)^2/3
(1/7)^2
\[\sqrt[3]{1/49}\]
since it is to the power of ^3 the third root cancels out going back to the answer of
1/49