The book "What is differentiation?" by Boltyansky B. G. It is a fascinating and in-depth study of one of the fundamental concepts of mathematical analysis, which finds application in many fields of science and technology. In this work, the author not only explains what differentiation is, but also immerses the reader in the fascinating world of mathematical ideas, allowing us to understand how these ideas shape our perception of the surrounding reality. Boltyansky V . G. — a well-known Russian mathematician and educator who has a unique talent for explaining complex concepts in a simple and accessible language His style of presentation is clear and logical, which makes the book suitable for both students and a wide range of readers interested in mathematics. If you have ever thought about how the world around us works and want to understand how differentiation helps describe change, this book will be a real discovery for you. In "What is differentiation?" the author examines not only theoretical aspects, but also the practical application of differentiation in various fields - from physics to economics. The reader will be able to learn how derivatives can be used to analyze movement, optimize processes, and even predict the behavior of complex systems. Boltiansky emphasizes that differentiation is not just a mathematical operation, but a powerful tool that helps us better understand the dynamics of change in nature and society. The book will be of interest not only to students and schoolchildren studying mathematics, but also to those who work in the scientific or engineering fields, as well as to anyone who wants to expand their knowledge of mathematics and its applications. If you like to solve puzzles, analyze data or just want to deepen your knowledge in the field of mathematics, then “What is differentiation?” will be an indispensable assistant for you. The topics raised in the book cover a wide range of issues, including the basics of limit processes, the rules of differentiation, and the application of derivatives to real-world problems. Boltyansky is not afraid to immerse himself in complex concepts, but at the same time he does it in such a way that even the most confusing ideas become understandable and accessible. His approach to learning is based on the fact that understanding the basics is the key to successfully mastering more complex topics. The book "What is Differentiation?" stands out among other tutorials for its accessibility and fun. There are no dry formulas and boring theorems instead, the author offers the reader a journey through the world of mathematical ideas, where each new concept is revealed through examples and practical problems. This makes reading not only useful, but also enjoyable. If you’re looking for math books like What is Differentiation?, take a look at the work of authors like G. M. Fichtenholz, A. N. Kolmogorov and others . They also offer interesting and accessible explanations of complex mathematical concepts. In conclusion, “What is differentiation?” is not just a textbook, but a real find for everyone who wants to understand how mathematics helps us to understand and analyze the world around us. Read this book and you will see how differentiation opens doors to new knowledge and understanding, making you more confident in your mathematical abilities.