The book is part of the educational complex "Mathematics for Economists," specially created for the country's economic universities by the Faculty of Economics of Lomonosov Moscow State University. Its goal is to give the student-economist the full amount of mathematical knowledge he needs in terms of mathematical analysis. At the same time, the student is clearly oriented, for what and when knowledge of certain sections of the discipline will be useful to him: how the mathematical apparatus of differential calculus is used in economic analysis, how production functions, functions of demand for resources, utility functions studied in microeconomics can be constructed using the theory of the function of several variables, etc.