They did this:
How, work the algebra magic, take the limit as h approaches 0 and you have it. The derivative of
Note: I used h instead of . Same thing
http://i43.tinypic.com/2j11mgy.jpg --> problem is here
I only would like to know how they got that from the derivative equation. Can you please show me step by step how you'd go about doing it, using that formula?
Thanks!!