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Question Number 140363 by cesarL last updated on 06/May/21

$$Myfriendscanyouhelpme?$$$$f(x,y)=x^3{y}^7-4e^{x-y}$$$$Find:$$$$a)\frac{{\partial }^{2}f}{\partial x\partial y}=?$$$$b)\frac{{\partial }^2{f}^2}{\partial y\partial x}=?$$$$Please$$$$$$$$$$

Answered by Dwaipayan Shikari last updated on 06/May/21

$$\frac{\partial }{\partial x}.\frac{\partial }{\partial y}(x^3{y}^7-4e^{x-y})$$$$=21x^2{y}^6+4e^{x-y}$$

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