Partial Derivatives and the Gradient
Definition of Partial Derivative
Geometric Interpretation (x 0,y 0 ) x y z Slope = f x (x 0,y 0 )
Geometric Interpretation x y z Slope = f y (x 0,y 0 ) (x 0,y 0 )
Evaluating Partial Derivatives from the Definition
Example
Definition of Partial Derivative
Leibniz’s Notation
Example
Examples
Example r R h
Mixed Partials
Example
Remark
Definition of Gradient
Example
Does Partial Differentiability Imply Continuity?
Gradient Formulas