👉 Retain math is a branch of mathematics that focuses on the study of functions and their inverses, particularly in the context of real numbers. It involves understanding how functions behave, including their composition, inverses, and properties like continuity and differentiability. Retain math is crucial for solving problems in various fields, such as physics, engineering, and economics, where functions often model real-world phenomena. The core concepts include the Intermediate Value Theorem, which guarantees that a continuous function on a closed interval takes on every value between its maximum and minimum, and the Fundamental Theorem of Algebra, which states that every non-constant polynomial has at least one complex root. This area is foundational for more advanced mathematical topics and practical applications.