The following is Mobius' explanation for a solution to this question. You can use this and other online references as a guide, but your explanation should be in your own words. The derivative of a function of f at * is given by f' (2) = lim f(@th)-f(z) h-0 h provided the limit exists. Use the definition of the derivative to find the derivative of f (x) = 4x2 + 7x +9. Enter the fully simplified expression for f (a + h) - f (x). Do not factor. Make sure there is a space between variables f (= th) - f (x) = f (x) = Show your work and explain, in your own words, how you arrived at your answers. Editor A - A- Ix BIUS X X Styles Font Size Words: 0