Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Maxima and Minima
Students learn about applications of derivatives. Topics include maxima and minima. The tutorial explores the calculus concepts through notes and examples. A chapter quiz, review exercises, and chapter summary are included.
Wolfram Research
Wolfram Math World: First Derivative Test
This MathWorld site shows how to find extrema using the first derivative test.