Write out all the 3-element subsets of f1; 2; 3; 4; 5; 6g to verify that 6 3 D 20.

A Guide to MATLAB This book is a short, focused introduction to MATLAB, a comprehen- sive software system for mathematics and technical computing. It will be useful to bothbeginning and experienced users. It contains concise explanations of essential MATLAB commands, as well as easily under- stood instructions for using MATLAB’s programming features, graphi- cal capabilities, and desktop interface. It also includes an introduction to SIMULINK, a companion to MATLAB for system simulation. Written for MATLAB 6, this book can also be used with earlier (and later) versions of MATLAB. This book contains worked-out examples of applications of MATLAB to interesting problems in mathematics, engineering, economics, and physics. In addition, it contains explicit instructions for using MATLAB’s Microsoft Word interface to produce polished, integrated, interactive documents for reports, presentations, or online publishing. This book explains everything you need to know to begin using MATLAB to do all these things and more. Intermediate and advanced users will ﬁnd useful information here, especially if they are making the switch to MATLAB 6 from an earlier version. Brian R. Hunt is an Associate Professor of Mathematics at the Univer- sity of Maryland. Professor Hunt has coauthored four books on math- ematical software and more than 30 journal articles. He is currently involved in researchon dynamical systems and fractal geometry. Ronald L. Lipsman is a Professor of Mathematics and Associate Dean of the College of Computer, Mathematical, and Physical Sciences at