Write the Word or Phrase That Best Completes Each Statement $$f ( x ) = x ^ { 3 } + 9 \text { and } g ( x ) = \sqrt [ 3 ] { x - 9 }$$

Essay

Write the word or phrase that best completes each statement or answers the question.
Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.
- $$f ( x ) = x ^ { 3 } + 9 \text { and } g ( x ) = \sqrt [ 3 ] { x - 9 }$$