Call-outs used in this book

The call-outs used in this book have meanings:

These call-outs introduce the objectives for the sections of the book.

These call-outs offer helpful information.

This icon flags questions that have video solutions in the online book: a narrator works through the question, explaining the solution.

These call-outs highlight common mistakes or warnings, about (for example) a particular concept or about using a formula.

These call-outs highlight optional questions, that you might like to do in personal study.

These call-outs highlight drill questions, for practicing some of the mathematical computations.

These call-outs highlight questions to be completed before your tutorial.