Find and Simplify the Difference Quotient of F $$\frac { f ( x + h ) - f ( x ) } { h }$$

Multiple Choice

Find and simplify the difference quotient of f, $$\frac { f ( x + h ) - f ( x ) } { h }$$ $\mathbf { h } \neq 0$ , for the function.
- $$f ( x ) = \frac { 1 } { 7 x }$$

A) $\frac { - 1 } { 7 x ( x + h ) }$
B) $\frac { 1 } { 7 x }$
C) 0
D) $\frac { - 1 } { x ( x + h ) }$