10.3#8

Hi Dr. Taylor,

Will you remind me again what the notation means for E and F?

Please and thank you.

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for example f_{xy} means ∂/∂x ∂f/∂y or the derivative with respect to x of the derivative with respect to y of f(x,y). In other words, first take the derivative of f with respect to y, then take the derivative of that with respect to x.