Calculus III - Lagrange Multipliers
https://tutorial.math.lamar.edu/Classes/CalcIII/LagrangeMultipliers.aspx02.12.2019 · Plug in all solutions, (x,y,z) ( x, y, z), from the first step into f (x,y,z) f ( x, y, z) and identify the minimum and maximum values, provided they exist and ∇g ≠ →0 ∇ g ≠ 0 → at the point. The constant, λ λ , is called the Lagrange Multiplier.