An Introduction to Lagrange Multipliers

Lagrange multipliers are used in multivariable calculus to find maxima and minima of a function subject to constraints (like "find the highest elevation along the given path" or "minimize the cost of materials for a box enclosing a given volume"). It's a useful technique, but all too often it is poorly taught and poorly understood. With luck, this overview will help to make the concept and its app

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An intuitive introduction.