Let f(x)--3 2x+1 . For this problem, use the following definition of the derivative, F(a)= lim -(X)-(a) a. Set up the difference quotient (do not simplify), lim b. The numerator of the difference quotient when simplified into a single fraction becomes c. Before taking the limit, and after simplifying, the difference quotient expression becomes lim x- a d. Taking the limit, we have that f(a) =