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Hi, everyone. I am Cha Ling.
We learned the chain rule in the last lesson. In this lesson, we are going to learn "partial derivatives" and "directional derivatives".
Partial derivative
Partial derivatives were also mentioned in the introductory course. Partial derivatives are discussed for multivariate functions.
What is a multivariate function? Let’s take an example to see:
multivariate function: y = f (