This is the Definition of the Derivative using Hana's Method:

What is f(x)? What is a? What is f '(x)? What is f '(a)?

For further guidance, refer to the hints in problem 3-64.

This is the Definition of the Derivative using Ana's Method:

What is f(x)? What is a? What is f '(x)? What is f '(a)?

For further guidance, refer to the hints in problem 3-110b.