f$($x$)=3$x$3+6$x$+3$Write a limit representing the derivative of f$($x$)$ at a$=3.$ Be sure to use the following definition of the derivative:

The derivative of a function f$($x$)$ at x$=$a is given by f$($a$)=$limh$0$f$($a$+$h$)$f$($a$)$h$.$