![multivariable calculus - Calculate the partial derivative, local minima/maxima, and saddle points. - Mathematics Stack Exchange multivariable calculus - Calculate the partial derivative, local minima/maxima, and saddle points. - Mathematics Stack Exchange](https://i.stack.imgur.com/QwSHs.png)
multivariable calculus - Calculate the partial derivative, local minima/maxima, and saddle points. - Mathematics Stack Exchange
![MathType on X: "The #Hessian is a square matrix of second-order partial # derivatives that describes the local curvature of a #function of many variables. By studying this #matrix, one can test whether MathType on X: "The #Hessian is a square matrix of second-order partial # derivatives that describes the local curvature of a #function of many variables. By studying this #matrix, one can test whether](https://pbs.twimg.com/media/EouUfelVEAUqkVK.jpg:large)
MathType on X: "The #Hessian is a square matrix of second-order partial # derivatives that describes the local curvature of a #function of many variables. By studying this #matrix, one can test whether
![Find the local maxima minima and saddle points of f(x y)=xy(1-x-y) Partial differentiation - YouTube Find the local maxima minima and saddle points of f(x y)=xy(1-x-y) Partial differentiation - YouTube](https://i.ytimg.com/vi/JMbyEkCHvfo/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLBGRfEBB48P7UriU_0GNXvjta7-iw)