For the function f(x,y)=cos(x)exyf(x,y) = \cos(x)e^{xy}f(x,y)=cos(x)exy, find the mixed partial derivative ∂4f∂x3∂y(0,0)\frac{\partial^4 f}{\partial x^3 \partial y}(0,0)∂x3∂y∂4f(0,0).
−3-3−3
333
−1-1−1
000