Find the Derivative of the Following Function Using the Limiting $f ( x ) = \frac { 1 } { x ^ { 4 } }$

Multiple Choice

Find the derivative of the following function using the limiting process. $f ( x ) = \frac { 1 } { x ^ { 4 } }$

A) $f ^ {t } ( x ) = \frac { 4 } { x ^ { 5 } }$
B) $f ^ { t } ( x ) = - \frac { 4 } { x ^ { 3 } }$
C) $f ^ { t } ( x ) = \frac { 4 } { x ^ { 3 } }$
D) $f ^ {t } ( x ) = - \frac { 5 } { x ^ { 5 } }$
E) $f ^ { t } ( x ) = - \frac { 4 } { x ^ { 5 } }$