homework. Section 9.2 Assignment f(Z) - f(x) Use the formula f'(x) = lim to find the derivative of the following function. Z-X Z - X f(x) = x +9 f' (x)= Homework: Section 3.2 Assignment Differentiate the function, and find the slope of the tangent line at the given value of the independent variable. f(x) = 2x +-, x=2 The derivative of the function f(x) = 2x + - is x