For the Pair of Functions, Find the Indicated Sum, Difference $$f ( x ) = \sqrt { 7 x + 4 } , g ( x ) = \frac { 1 } { x }$$

Multiple Choice

For the pair of functions, find the indicated sum, difference, product, or quotient.
- $$f ( x ) = \sqrt { 7 x + 4 } , g ( x ) = \frac { 1 } { x }$$
Find $( f - g ) ( x )$

A) $\frac { 1 } { \sqrt { 7 x + 4 } - x }$
B) $\frac { 1 } { x } - \sqrt { 7 x + 4 }$
C) $\sqrt { 7 x + 4 - \frac { 1 } { x } }$
D) $\sqrt { 7 x + 4 } - \frac { 1 } { x }$