Multivariate Calculus: Lecture 19: partial derivatives

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Enjoyable video :)
I believe there is a mistake at 44:25 . According to wolfram the partial derivative of x^y^z
with respect to z is ln(x) * y^z * ln(y) * x^y^z, not ln(x^y) * (x^y)^z.

I think you interpreted x^y^z as (x^y)^z which is different than x^(y^z).

bclan