In the App:[br] Type in the desired numerator and denominator formulas for the function [i]f[/i]([i]x[/i]).[br] Show its (blue) graph if desired by checking its checkbox.[br] Fill in the boxes for the various parts of computing the derivative f '(x) using the Quotient Rule.[br] If you do this correctly, then the formulas will turn green instead of red.[br] Check the checkbox for [i]f[/i] '([i]x[/i]) to see its formula and graph. (It may not be given in the best form.)