$$\text { Find the derivative of the function } f ( x ) = \sqrt { 7 x - 3 } \text { using the limiting process. }$$

Multiple Choice

$$\text { Find the derivative of the function } f ( x ) = \sqrt { 7 x - 3 } \text { using the limiting process. }$$

A) $f ^ { t } ( x ) = \frac { 7 } { 2 \sqrt { 7 x - 3 } }$
B) $f ^ { t } ( x ) = - \frac { 7 } { 2 \sqrt { 7 x - 3 } }$
C) $f ^ { t } ( x ) = - \frac { 7 x } { \sqrt { 7 x - 3 } }$
D) $f ^ {t } ( x ) = \frac { 7 } { 2 } \sqrt { 7 x - 3 }$
E) $f ^ { t } ( x ) = - \frac { 7 } { \sqrt { 7 x - 3 } }$