$4.)(4$ pts$)$ Consider the function

f $($x$)=3($x$216)$

x$29.$

whose domain is all x except x $=3.$

Show that the first and second derivatives of this function are given

by

f $($x$)=42$x

$($x$29)2,$ f $($x$)=126($x$2+3)$

$($x$29)3.$

Display all calculations clearly. You do not need to do anything else in

this problem.

G$5.)(1$ pt each part$)$ Consider the function f from problem $4$ and use

the suggested formulas for f $($x$)$ and f $($x$).$