Math Competition Books Series -- The AM-GM inequality is a powerful problem-solving tool. This book shows how you can use the AM-GM Inequality to solve a variety of problems, such as geometry, equations, inequalities, and finding the maximum/minimum value.The book can be used by students preparing for math competitions such as Mathcounts, AMC 8/10/12, and AIME (American Invitational Mathematics Examination).Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems. 9th book: Problem Solving Using Auxiliary Lineshttps://www.amazon.com/dp/1975681754 10th book: https://www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056