In the App[br] Type in the two factors for the function f(x). Check the checkbox for f(x) to see its graph in blue.[br] Type in formulas in the input boxes showing the steps of the calculation of the derivative function (f '(x)). [br] If you type the correct formula, then the text will turn green instead of red.[br] Check the checkbox for f '(x) to see the formula and graph of the derivative function. [br] Note that the formula given for f ' may not be the best, most simplified form.[br]