The direction are to find g'(x) for the function. g'(x)= slope

this is the equation we are given

g'(x)=lim (g(x+h)-g(x))/h The limit is h>0

the function is rad(3x-2)

idk how to do the rad sign on the keyboard. ITs all under the rad

i know how to do these problems, its just i got stuck on this specific one. Thanks a lot for the help