14.4: Tangent Planes and Linear Approximations
https://math.libretexts.org/Bookshelves/Calculus/Calculus_(OpenStax)/14%3A_Differentiation_of_Functions_of_Several_Variables/14.04%3A_Tangent_Planes_and_Linear_Approximations
WEBNov 10, 2023 · Definition: Linear Approximation. Given a function \( z=f(x,y)\) with continuous partial derivatives that exist at the point \( (x_0,y_0)\), the linear approximation of \(f\) at the point \( (x_0,y_0)\) is given by the equation \[L(x,y)=f(x_0,y_0)+f_x(x_0,y_0)(x−x_0)+f_y(x_0,y_0)(y−y_0). \label{approx} \]
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