For the Pair of Functions, Determine the Domain of F $$f ( x ) = 3 x ^ { 2 } + 1 , g ( x ) = 5 x ^ { 3 } - 7$$

Multiple Choice

For the pair of functions, determine the domain of f + g.
- $$f ( x ) = 3 x ^ { 2 } + 1 , g ( x ) = 5 x ^ { 3 } - 7$$

A) $( \infty , \infty )$
B) $( \infty , 0 )$
C) $( 0 , \infty )$
D) $( \infty , 0 )$ or $( 0 , \infty )$