The derivative of a function of f at a is given by f (x) = 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 + 5x +4. Enter the fully simplified expression for f (a + h) - f (x). Do not factor. Make sure there is a space between variables. f(x th) - f(x) = f (x) = Show your work and explain, in your own words, how you arrived at your answers. Q Equation Editor A - A- Ix BIUS X X Styles Font Size