Use of partial derivative in max-min problems.

Description
The use of partial derivatives in maximization and minimization problems is explained with the help of some examples. The approximation formula is stated and is justified. The tangent plane is also discussed in this video tutorial. Optimization problems are solved.
Prof. Denis Auroux, Maths, Fall 2007,18.02 Multivariable Calculus: 9: Max-Min and Least Squares, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed August 16,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc