Differentiate the Following Functions:
(A) $f ( x ) = \frac { 3 } { x ^ { 2 } } + x ^ { 2 }$

Essay

Differentiate the following functions:
(a) $f ( x ) = \frac { 3 } { x ^ { 2 } } + x ^ { 2 }$ (b) $f ( t ) = \frac { 4 \pi } { 3 } t ^ { 3 }$ (c) $f ( s ) = e ^ { x }$ (d) $f ( r ) = ( 4 r - 3 ) ^ { 2 }$