Ok i got this problem...(adsbygoogle = window.adsbygoogle || []).push({});

T(x,y,z,t)= -2xy^2+e^(-3z)cos(5x-.75t)

taking the partial derivative with respect to x first, so i break the problem apart with the left and right sign of the addition side

so i get...

-2y^2 for the left side and then am stubling on the right side, im think just chain rule since e^(-3z) is constant right? so I get -sin(5x-.75t)5 from the right side.

any help

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# Homework Help: Partial derivatives review

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