In this video, you will learn how to find the second, third, fourth, and higher derivatives of functions, including polynomials trig functions, and square root functions. Also, you will learn what the derivatives mean graphically. Some of the graphs shown are really interesting and helpful for understanding what is really going on with first and second derivatives, concavity, and inflection points. Linear, quadratic, and cubic approximations of functions are also found and shown graphically. A really interesting video.