posted by maggie .
find the domain of the function
a) f(x,y) = e^(-xy)
b) h,(u,v)= √(4-u^2 - v^2)
find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y
and show that the mixed partial derivatives fxy and fyx are equal
For part B, your figure there is an ellipsoid, x^2+y^2+z^2=4, so the domain should be (x,y,z):X<4,y<4,z<4